automatically select classification model with optimized hyperparameters -凯发k8网页登录
automatically select classification model with optimized hyperparameters
since r2020a
syntax
description
given predictor and response data, fitcauto automatically
tries a selection of classification model types with different hyperparameter values. by
default, the function uses bayesian optimization to select models and their hyperparameter
values, and computes the cross-validation classification error for each model. after the
optimization is complete, fitcauto returns the model, trained on the
entire data set, that is expected to best classify new data. you can use the
predict and loss object functions of the returned
model to classify new data and compute the test set classification error,
respectively.
use fitcauto when you are uncertain which classifier types best suit
your data. for information on alternative methods for tuning hyperparameters of classification
models, see alternative functionality.
if your data contains over 10,000 observations, consider using an asynchronous successive
halving algorithm (asha) instead of bayesian optimization when you run
fitcauto. asha optimization often finds good solutions faster than
bayesian optimization for data sets with many observations.
mdl = fitcauto(tbl,responsevarname)mdl with tuned hyperparameters. the
table tbl contains the predictor variables and the response variable,
where responsevarname is the name of the response variable.
mdl = fitcauto(___,name,value)hyperparameteroptimizationoptions name-value argument to specify
whether to use bayesian optimization (default) or an asynchronous successive halving
algorithm (asha). to use asha optimization, specify
"hyperparameteroptimizationoptions",struct("optimizer","asha"). you
can include additional fields in the structure to control other aspects of the
optimization.
[
also returns mdl,optimizationresults] = fitcauto(___)optimizationresults, which contains the results of the
model selection and hyperparameter tuning process. this output is a
bayesianoptimization object when you use bayesian optimization, and a
table when you use asha optimization.
examples
automatically select classifier using table data
use fitcauto to automatically select a classification model with optimized hyperparameters, given predictor and response data stored in a table.
load data
load the carbig data set, which contains measurements of cars made in the 1970s and early 1980s.
load carbigcategorize the cars based on whether they were made in the usa.
origin = categorical(cellstr(origin)); origin = mergecats(origin,["france","japan","germany", ... "sweden","italy","england"],"notusa");
create a table containing the predictor variables acceleration, displacement, and so on, as well as the response variable origin.
cars = table(acceleration,displacement,horsepower, ...
model_year,mpg,weight,origin);partition data
partition the data into training and test sets. use approximately 80% of the observations for the model selection and hyperparameter tuning process, and 20% of the observations to test the performance of the final model returned by fitcauto. use cvpartition to partition the data.
rng("default") % for reproducibility of the data partition c = cvpartition(origin,"holdout",0.2); trainingidx = training(c); % training set indices carstrain = cars(trainingidx,:); testidx = test(c); % test set indices carstest = cars(testidx,:);
run fitcauto
pass the training data to fitcauto. by default, fitcauto determines appropriate model types to try, uses bayesian optimization to find good hyperparameter values, and returns a trained model mdl with the best expected performance. additionally, fitcauto provides a plot of the optimization and an iterative display of the optimization results. for more information on how to interpret these results, see verbose display.
expect this process to take some time. to speed up the optimization process, consider specifying to run the optimization in parallel, if you have a parallel computing toolbox™ license. to do so, pass "hyperparameteroptimizationoptions",struct("useparallel",true) to fitcauto as a name-value argument.
mdl = fitcauto(carstrain,"origin");warning: it is recommended that you first standardize all numeric predictors when optimizing the naive bayes 'width' parameter. ignore this warning if you have done that.
learner types to explore: ensemble, knn, nb, net, svm, tree total iterations (maxobjectiveevaluations): 180 total time (maxtime): inf |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 1 | best | 0.37179 | 0.62903 | 0.37179 | 0.37179 | svm | boxconstraint: 0.11704 | | | | | | | | | kernelscale: 0.004903 | | 2 | best | 0.22769 | 0.42586 | 0.22769 | 0.22769 | nb | distributionnames: normal | | | | | | | | | width: nan | | 3 | best | 0.19231 | 0.42729 | 0.19231 | 0.19231 | knn | numneighbors: 3 | | 4 | accept | 0.22769 | 0.1005 | 0.19231 | 0.19231 | nb | distributionnames: normal | | | | | | | | | width: nan | | 5 | best | 0.1891 | 0.13361 | 0.1891 | 0.19096 | knn | numneighbors: 12 | | 6 | best | 0.10154 | 0.28324 | 0.10154 | 0.10154 | tree | minleafsize: 5 | | 7 | accept | 0.16026 | 7.2743 | 0.10154 | 0.10154 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.025856 | | | | | | | | | layersizes: [ 286 51 3 ] | | 8 | accept | 0.37179 | 0.096727 | 0.10154 | 0.10154 | svm | boxconstraint: 1.2607 | | | | | | | | | kernelscale: 97.75 | | 9 | accept | 0.37179 | 0.25096 | 0.10154 | 0.10154 | net | activations: relu | | | | | | | | | standardize: true | | | | | | | | | lambda: 211.47 | | | | | | | | | layersizes: [ 102 222 ] | | 10 | accept | 0.19231 | 0.070249 | 0.10154 | 0.10154 | knn | numneighbors: 15 | | 11 | accept | 0.22769 | 0.067816 | 0.10154 | 0.10154 | nb | distributionnames: normal | | | | | | | | | width: nan | | 12 | accept | 0.15077 | 9.2891 | 0.10154 | 0.10154 | ensemble | method: bag | | | | | | | | | numlearningcycles: 249 | | | | | | | | | minleafsize: 25 | | 13 | accept | 0.22769 | 0.063862 | 0.10154 | 0.10154 | nb | distributionnames: normal | | | | | | | | | width: nan | | 14 | accept | 0.37179 | 0.092315 | 0.10154 | 0.10154 | svm | boxconstraint: 9.3148 | | | | | | | | | kernelscale: 0.0017736 | | 15 | accept | 0.24615 | 0.64539 | 0.10154 | 0.10154 | nb | distributionnames: kernel | | | | | | | | | width: 1.2125 | | 16 | accept | 0.12615 | 0.074982 | 0.10154 | 0.11409 | tree | minleafsize: 7 | | 17 | accept | 0.16308 | 9.4331 | 0.10154 | 0.11409 | ensemble | method: bag | | | | | | | | | numlearningcycles: 284 | | | | | | | | | minleafsize: 89 | | 18 | accept | 0.16923 | 0.062929 | 0.10154 | 0.13272 | tree | minleafsize: 81 | | 19 | accept | 0.37179 | 0.096521 | 0.10154 | 0.13272 | svm | boxconstraint: 1.6219 | | | | | | | | | kernelscale: 0.0011185 | | 20 | accept | 0.25321 | 0.069954 | 0.10154 | 0.13272 | knn | numneighbors: 124 | |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 21 | accept | 0.37179 | 0.081257 | 0.10154 | 0.13272 | svm | boxconstraint: 0.0011787 | | | | | | | | | kernelscale: 1.1427 | | 22 | accept | 0.22769 | 0.062348 | 0.10154 | 0.13272 | nb | distributionnames: normal | | | | | | | | | width: nan | | 23 | accept | 0.13846 | 9.7413 | 0.10154 | 0.13272 | ensemble | method: bag | | | | | | | | | numlearningcycles: 279 | | | | | | | | | minleafsize: 2 | | 24 | accept | 0.25231 | 0.19127 | 0.10154 | 0.13272 | nb | distributionnames: kernel | | | | | | | | | width: 1.6084 | | 25 | accept | 0.22769 | 0.062537 | 0.10154 | 0.13272 | nb | distributionnames: normal | | | | | | | | | width: nan | | 26 | accept | 0.19872 | 0.079713 | 0.10154 | 0.13272 | knn | numneighbors: 1 | | 27 | accept | 0.23397 | 3.666 | 0.10154 | 0.13272 | net | activations: tanh | | | | | | | | | standardize: false | | | | | | | | | lambda: 1.1283e-06 | | | | | | | | | layersizes: [ 102 1 ] | | 28 | accept | 0.13538 | 0.070656 | 0.10154 | 0.1338 | tree | minleafsize: 19 | | 29 | accept | 0.19551 | 0.064085 | 0.10154 | 0.1338 | knn | numneighbors: 26 | | 30 | accept | 0.37179 | 0.09049 | 0.10154 | 0.1338 | svm | boxconstraint: 3.391 | | | | | | | | | kernelscale: 0.021864 | | 31 | accept | 0.1891 | 2.712 | 0.10154 | 0.1338 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 1.0513e-06 | | | | | | | | | layersizes: [ 2 2 ] | | 32 | accept | 0.21154 | 0.063578 | 0.10154 | 0.1338 | knn | numneighbors: 2 | | 33 | accept | 0.10154 | 0.070667 | 0.10154 | 0.12751 | tree | minleafsize: 5 | | 34 | accept | 0.37179 | 0.096094 | 0.10154 | 0.12751 | svm | boxconstraint: 469.1 | | | | | | | | | kernelscale: 0.0089806 | | 35 | accept | 0.14462 | 8.4121 | 0.10154 | 0.12751 | ensemble | method: bag | | | | | | | | | numlearningcycles: 241 | | | | | | | | | minleafsize: 1 | | 36 | accept | 0.11385 | 0.066814 | 0.10154 | 0.11727 | tree | minleafsize: 11 | | 37 | best | 0.098462 | 5.7806 | 0.098462 | 0.11727 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 218 | | | | | | | | | minleafsize: 48 | | 38 | accept | 0.22769 | 0.061168 | 0.098462 | 0.11727 | nb | distributionnames: normal | | | | | | | | | width: nan | | 39 | accept | 0.37179 | 0.44849 | 0.098462 | 0.11727 | net | activations: tanh | | | | | | | | | standardize: false | | | | | | | | | lambda: 29.705 | | | | | | | | | layersizes: 118 | | 40 | accept | 0.24923 | 0.19982 | 0.098462 | 0.11727 | nb | distributionnames: kernel | | | | | | | | | width: 3.9774 | |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 41 | accept | 0.18769 | 0.063134 | 0.098462 | 0.11494 | tree | minleafsize: 112 | | 42 | accept | 0.10769 | 5.1672 | 0.098462 | 0.11494 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 213 | | | | | | | | | minleafsize: 6 | | 43 | accept | 0.17628 | 0.064608 | 0.098462 | 0.11494 | knn | numneighbors: 41 | | 44 | accept | 0.37231 | 0.065944 | 0.098462 | 0.11788 | tree | minleafsize: 152 | | 45 | accept | 0.22769 | 0.055901 | 0.098462 | 0.11788 | nb | distributionnames: normal | | | | | | | | | width: nan | | 46 | accept | 0.37179 | 0.070447 | 0.098462 | 0.11788 | svm | boxconstraint: 0.017639 | | | | | | | | | kernelscale: 1.8123 | | 47 | accept | 0.37179 | 0.22159 | 0.098462 | 0.11788 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 2.6201 | | | | | | | | | layersizes: [ 134 10 240 ] | | 48 | accept | 0.37179 | 0.16389 | 0.098462 | 0.11788 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.12107 | | | | | | | | | layersizes: [ 253 1 ] | | 49 | accept | 0.13141 | 0.077293 | 0.098462 | 0.11788 | svm | boxconstraint: 31.426 | | | | | | | | | kernelscale: 1.6379 | | 50 | accept | 0.22769 | 0.055984 | 0.098462 | 0.11788 | nb | distributionnames: normal | | | | | | | | | width: nan | | 51 | accept | 0.14769 | 9.3995 | 0.098462 | 0.11788 | ensemble | method: bag | | | | | | | | | numlearningcycles: 272 | | | | | | | | | minleafsize: 1 | | 52 | accept | 0.12923 | 0.063907 | 0.098462 | 0.11796 | tree | minleafsize: 3 | | 53 | accept | 0.37179 | 0.10353 | 0.098462 | 0.11796 | svm | boxconstraint: 20.907 | | | | | | | | | kernelscale: 0.0030163 | | 54 | accept | 0.15385 | 8.3016 | 0.098462 | 0.11796 | ensemble | method: bag | | | | | | | | | numlearningcycles: 243 | | | | | | | | | minleafsize: 18 | | 55 | accept | 0.17628 | 0.061456 | 0.098462 | 0.11796 | knn | numneighbors: 41 | | 56 | accept | 0.16667 | 0.7857 | 0.098462 | 0.11796 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.00041104 | | | | | | | | | layersizes: 2 | | 57 | accept | 0.22769 | 0.058204 | 0.098462 | 0.11796 | nb | distributionnames: normal | | | | | | | | | width: nan | | 58 | accept | 0.17949 | 4.0585 | 0.098462 | 0.11796 | net | activations: sigmoid | | | | | | | | | standardize: false | | | | | | | | | lambda: 3.7419e-06 | | | | | | | | | layersizes: [ 8 37 ] | | 59 | accept | 0.23385 | 0.22143 | 0.098462 | 0.11796 | nb | distributionnames: kernel | | | | | | | | | width: 561.16 | | 60 | accept | 0.19551 | 0.06451 | 0.098462 | 0.11796 | knn | numneighbors: 26 | |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 61 | accept | 0.37231 | 6.2084 | 0.098462 | 0.11796 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 272 | | | | | | | | | minleafsize: 161 | | 62 | accept | 0.37179 | 0.090047 | 0.098462 | 0.11796 | svm | boxconstraint: 29.741 | | | | | | | | | kernelscale: 0.045927 | | 63 | accept | 0.20513 | 6.8138 | 0.098462 | 0.11796 | net | activations: sigmoid | | | | | | | | | standardize: false | | | | | | | | | lambda: 5.1269e-08 | | | | | | | | | layersizes: [ 175 2 4 ] | | 64 | accept | 0.1891 | 0.05843 | 0.098462 | 0.11796 | knn | numneighbors: 9 | | 65 | accept | 0.19231 | 0.067392 | 0.098462 | 0.11796 | knn | numneighbors: 15 | | 66 | accept | 0.12923 | 0.075809 | 0.098462 | 0.11512 | tree | minleafsize: 3 | | 67 | accept | 0.37179 | 0.073588 | 0.098462 | 0.11512 | svm | boxconstraint: 0.018753 | | | | | | | | | kernelscale: 0.38262 | | 68 | accept | 0.17308 | 0.06212 | 0.098462 | 0.11512 | knn | numneighbors: 4 | | 69 | accept | 0.14769 | 0.074561 | 0.098462 | 0.11688 | tree | minleafsize: 2 | | 70 | accept | 0.13538 | 7.9953 | 0.098462 | 0.11674 | ensemble | method: bag | | | | | | | | | numlearningcycles: 222 | | | | | | | | | minleafsize: 1 | | 71 | accept | 0.13538 | 0.062477 | 0.098462 | 0.11674 | tree | minleafsize: 19 | | 72 | accept | 0.12923 | 0.063529 | 0.098462 | 0.11674 | tree | minleafsize: 8 | | 73 | accept | 0.15064 | 1.8048 | 0.098462 | 0.11674 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.00059411 | | | | | | | | | layersizes: [ 5 4 ] | | 74 | accept | 0.22769 | 0.058621 | 0.098462 | 0.11674 | nb | distributionnames: normal | | | | | | | | | width: nan | | 75 | accept | 0.16987 | 5.3533 | 0.098462 | 0.11674 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.00022289 | | | | | | | | | layersizes: [ 81 9 ] | | 76 | accept | 0.14154 | 7.4446 | 0.098462 | 0.11813 | ensemble | method: bag | | | | | | | | | numlearningcycles: 214 | | | | | | | | | minleafsize: 7 | | 77 | accept | 0.33846 | 0.059384 | 0.098462 | 0.1167 | tree | minleafsize: 130 | | 78 | accept | 0.13231 | 4.9246 | 0.098462 | 0.1167 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 212 | | | | | | | | | minleafsize: 64 | | 79 | accept | 0.37179 | 0.12859 | 0.098462 | 0.1167 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 5.8307 | | | | | | | | | layersizes: [ 20 1 ] | | 80 | accept | 0.14154 | 7.5942 | 0.098462 | 0.1167 | ensemble | method: bag | | | | | | | | | numlearningcycles: 219 | | | | | | | | | minleafsize: 7 | |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 81 | accept | 0.19872 | 0.063107 | 0.098462 | 0.1167 | knn | numneighbors: 1 | | 82 | accept | 0.37179 | 0.14405 | 0.098462 | 0.1167 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 15.587 | | | | | | | | | layersizes: [ 182 4 ] | | 83 | accept | 0.37179 | 0.3951 | 0.098462 | 0.1167 | net | activations: none | | | | | | | | | standardize: false | | | | | | | | | lambda: 0.00026401 | | | | | | | | | layersizes: [ 1 79 ] | | 84 | accept | 0.14154 | 6.1198 | 0.098462 | 0.1167 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 266 | | | | | | | | | minleafsize: 110 | | 85 | accept | 0.14423 | 0.10373 | 0.098462 | 0.1167 | svm | boxconstraint: 322.43 | | | | | | | | | kernelscale: 1.7393 | | 86 | accept | 0.12 | 0.073943 | 0.098462 | 0.11425 | tree | minleafsize: 4 | | 87 | accept | 0.37179 | 0.089384 | 0.098462 | 0.11425 | svm | boxconstraint: 0.0026322 | | | | | | | | | kernelscale: 0.004006 | | 88 | accept | 0.14154 | 9.5099 | 0.098462 | 0.11425 | ensemble | method: bag | | | | | | | | | numlearningcycles: 276 | | | | | | | | | minleafsize: 2 | | 89 | accept | 0.37179 | 0.088251 | 0.098462 | 0.11425 | svm | boxconstraint: 25.201 | | | | | | | | | kernelscale: 0.019423 | | 90 | accept | 0.1891 | 0.072839 | 0.098462 | 0.11425 | knn | numneighbors: 13 | | 91 | accept | 0.12615 | 4.8775 | 0.098462 | 0.11425 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 211 | | | | | | | | | minleafsize: 75 | | 92 | accept | 0.14154 | 4.9062 | 0.098462 | 0.11425 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 213 | | | | | | | | | minleafsize: 96 | | 93 | accept | 0.11077 | 6.4978 | 0.098462 | 0.11425 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 277 | | | | | | | | | minleafsize: 4 | | 94 | accept | 0.10154 | 6.4944 | 0.098462 | 0.11048 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 274 | | | | | | | | | minleafsize: 16 | | 95 | accept | 0.12615 | 6.6536 | 0.098462 | 0.11217 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 289 | | | | | | | | | minleafsize: 53 | | 96 | accept | 0.14462 | 4.5605 | 0.098462 | 0.1093 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 201 | | | | | | | | | minleafsize: 91 | | 97 | best | 0.089231 | 5.7135 | 0.089231 | 0.10371 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 242 | | | | | | | | | minleafsize: 13 | | 98 | accept | 0.10769 | 5.5323 | 0.089231 | 0.10353 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 233 | | | | | | | | | minleafsize: 10 | | 99 | accept | 0.12 | 5.9044 | 0.089231 | 0.10351 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 253 | | | | | | | | | minleafsize: 26 | | 100 | accept | 0.10154 | 6.4575 | 0.089231 | 0.10122 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 272 | | | | | | | | | minleafsize: 13 | |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 101 | accept | 0.16026 | 7.4685 | 0.089231 | 0.10122 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.020619 | | | | | | | | | layersizes: [ 117 160 2 ] | | 102 | accept | 0.20513 | 3.5845 | 0.089231 | 0.10122 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.052211 | | | | | | | | | layersizes: [ 18 182 163 ] | | 103 | best | 0.086154 | 4.9401 | 0.086154 | 0.095252 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 208 | | | | | | | | | minleafsize: 15 | | 104 | accept | 0.095385 | 6.4925 | 0.086154 | 0.096118 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 274 | | | | | | | | | minleafsize: 14 | | 105 | accept | 0.092308 | 4.8125 | 0.086154 | 0.093255 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 201 | | | | | | | | | minleafsize: 14 | | 106 | accept | 0.37231 | 4.7781 | 0.086154 | 0.092615 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 207 | | | | | | | | | minleafsize: 134 | | 107 | accept | 0.14462 | 4.7742 | 0.086154 | 0.097454 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 206 | | | | | | | | | minleafsize: 93 | | 108 | accept | 0.092308 | 4.9755 | 0.086154 | 0.092405 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 206 | | | | | | | | | minleafsize: 14 | | 109 | accept | 0.092308 | 4.9658 | 0.086154 | 0.091949 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 208 | | | | | | | | | minleafsize: 20 | | 110 | accept | 0.10154 | 5.0332 | 0.086154 | 0.092013 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 207 | | | | | | | | | minleafsize: 16 | | 111 | accept | 0.17846 | 4.6286 | 0.086154 | 0.092219 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 201 | | | | | | | | | minleafsize: 120 | | 112 | accept | 0.18462 | 5.3291 | 0.086154 | 0.092663 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 234 | | | | | | | | | minleafsize: 114 | | 113 | accept | 0.10154 | 4.9436 | 0.086154 | 0.091972 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 210 | | | | | | | | | minleafsize: 21 | | 114 | accept | 0.10154 | 4.8767 | 0.086154 | 0.092793 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 208 | | | | | | | | | minleafsize: 23 | | 115 | accept | 0.10769 | 4.8384 | 0.086154 | 0.09189 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 203 | | | | | | | | | minleafsize: 27 | | 116 | accept | 0.089231 | 5.1892 | 0.086154 | 0.091881 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 216 | | | | | | | | | minleafsize: 18 | | 117 | accept | 0.095385 | 5.2157 | 0.086154 | 0.092387 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 220 | | | | | | | | | minleafsize: 15 | | 118 | accept | 0.095385 | 5.0879 | 0.086154 | 0.092544 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 213 | | | | | | | | | minleafsize: 15 | | 119 | accept | 0.10154 | 5.6188 | 0.086154 | 0.092332 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 235 | | | | | | | | | minleafsize: 17 | | 120 | accept | 0.37179 | 0.197 | 0.086154 | 0.092332 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.063953 | | | | | | | | | layersizes: [ 220 3 ] | |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 121 | accept | 0.37179 | 0.1961 | 0.086154 | 0.092332 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.055033 | | | | | | | | | layersizes: [ 97 13 ] | | 122 | accept | 0.14103 | 1.4229 | 0.086154 | 0.092332 | net | activations: none | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.00085152 | | | | | | | | | layersizes: [ 197 20 2 ] | | 123 | accept | 0.37179 | 0.22892 | 0.086154 | 0.092332 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.051445 | | | | | | | | | layersizes: [ 247 6 ] | | 124 | accept | 0.13782 | 0.38245 | 0.086154 | 0.092332 | net | activations: none | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0087893 | | | | | | | | | layersizes: [ 199 2 ] | | 125 | accept | 0.26282 | 1.0954 | 0.086154 | 0.092332 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.016624 | | | | | | | | | layersizes: [ 115 10 ] | | 126 | accept | 0.18269 | 0.24182 | 0.086154 | 0.092332 | net | activations: none | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.035571 | | | | | | | | | layersizes: [ 224 9 ] | | 127 | accept | 0.095385 | 5.0171 | 0.086154 | 0.091895 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 208 | | | | | | | | | minleafsize: 2 | | 128 | accept | 0.37179 | 0.13063 | 0.086154 | 0.091895 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0424 | | | | | | | | | layersizes: [ 4 2 3 ] | | 129 | accept | 0.14103 | 2.0229 | 0.086154 | 0.091895 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0028328 | | | | | | | | | layersizes: [ 1 8 1 ] | | 130 | accept | 0.18269 | 1.0404 | 0.086154 | 0.091895 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.037003 | | | | | | | | | layersizes: [ 153 3 ] | | 131 | accept | 0.14423 | 2.7718 | 0.086154 | 0.091895 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0058072 | | | | | | | | | layersizes: [ 1 72 ] | | 132 | accept | 0.14103 | 9.7891 | 0.086154 | 0.091895 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0040232 | | | | | | | | | layersizes: [ 1 88 57 ] | | 133 | accept | 0.14103 | 0.44563 | 0.086154 | 0.091895 | net | activations: none | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0020791 | | | | | | | | | layersizes: [ 3 5 2 ] | | 134 | accept | 0.37179 | 0.13512 | 0.086154 | 0.091895 | net | activations: relu | | | | | | | | | standardize: false | | | | | | | | | lambda: 0.027533 | | | | | | | | | layersizes: [ 2 2 1 ] | | 135 | accept | 0.18269 | 1.6723 | 0.086154 | 0.091895 | net | activations: relu | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0042357 | | | | | | | | | layersizes: [ 5 3 1 ] | | 136 | accept | 0.23397 | 3.4642 | 0.086154 | 0.091895 | net | activations: tanh | | | | | | | | | standardize: false | | | | | | | | | lambda: 0.00033175 | | | | | | | | | layersizes: [ 1 26 1 ] | | 137 | accept | 0.21154 | 3.0298 | 0.086154 | 0.091895 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.030788 | | | | | | | | | layersizes: [ 1 130 48 ] | | 138 | accept | 0.086154 | 5.109 | 0.086154 | 0.091384 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 210 | | | | | | | | | minleafsize: 15 | | 139 | accept | 0.14103 | 5.9512 | 0.086154 | 0.091384 | net | activations: tanh | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0029983 | | | | | | | | | layersizes: [ 1 11 104 ] | | 140 | accept | 0.14744 | 3.0068 | 0.086154 | 0.091384 | net | activations: relu | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.007429 | | | | | | | | | layersizes: [ 1 102 25 ] | |=============================================================================================================================================| | iter | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | result | loss | & validation (sec)| validation loss | validation loss | | | |=============================================================================================================================================| | 141 | accept | 0.22436 | 2.6641 | 0.086154 | 0.091384 | net | activations: none | | | | | | | | | standardize: false | | | | | | | | | lambda: 0.001718 | | | | | | | | | layersizes: [ 3 7 125 ] | | 142 | accept | 0.089231 | 5.0047 | 0.086154 | 0.089265 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 209 | | | | | | | | | minleafsize: 15 | | 143 | accept | 0.14154 | 5.1754 | 0.086154 | 0.0895 | ensemble | method: logitboost | | | | | | | | | numlearningcycles: 213 | | | | | | | | | minleafsize: 100 | | 144 | accept | 0.37179 | 0.1594 | 0.086154 | 0.0895 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.011755 | | | | | | | | | layersizes: [ 5 1 2 ] | | 145 | accept | 0.37179 | 0.37807 | 0.086154 | 0.0895 | net | activations: sigmoid | | | | | | | | | standardize: true | | | | | | | | | lambda: 0.0033755 | | | | | | | | | lay...
__________________________________________________________ optimization completed. total iterations: 180 total elapsed time: 699.614 seconds total time for training and validation: 493.3351 seconds best observed learner is an ensemble model with: learner: ensemble method: logitboost numlearningcycles: 208 minleafsize: 15 observed validation loss: 0.086154 time for training and validation: 4.9401 seconds best estimated learner (returned model) is an ensemble model with: learner: ensemble method: logitboost numlearningcycles: 209 minleafsize: 15 estimated validation loss: 0.089192 estimated time for training and validation: 5.0288 seconds documentation for fitcauto display
the final model returned by fitcauto corresponds to the best estimated learner. before returning the model, the function retrains it using the entire training data (carstrain), the listed learner (or model) type, and the displayed hyperparameter values.
evaluate test set performance
evaluate the performance of the model on the test set.
testaccuracy = 1 - loss(mdl,carstest,"origin")testaccuracy = 0.9263
confusionchart(carstest.origin,predict(mdl,carstest))
automatically select classifier using matrix data
use fitcauto to automatically select a classification model with optimized hyperparameters, given predictor and response data stored in separate variables.
load data
load the humanactivity data set. this data set contains 24,075 observations of five physical human activities: sitting (1), standing (2), walking (3), running (4), and dancing (5). each observation has 60 features extracted from acceleration data measured by smartphone accelerometer sensors. the variable feat contains the predictor data matrix of the 60 features for the 24,075 observations, and the response variable actid contains the activity ids for the observations as integers.
load humanactivitypartition data
partition the data into training and test sets. use 90% of the observations to select a model, and 10% of the observations to validate the final model returned by fitcauto. use cvpartition to reserve 10% of the observations for testing.
rng("default") % for reproducibility of the partition c = cvpartition(actid,"holdout",0.10); trainingindices = training(c); % indices for the training set xtrain = feat(trainingindices,:); ytrain = actid(trainingindices); testindices = test(c); % indices for the test set xtest = feat(testindices,:); ytest = actid(testindices);
run fitcauto
pass the training data to fitcauto. because the training data xtrain has more than 10,000 observations, use asha optimization rather than bayesian optimization. the fitcauto function randomly selects appropriate model (or learner) types with different hyperparameter values, trains the models on a small subset of the training data, promotes the models that perform well, and retrains the promoted models on progressively larger sets of training data. the function returns the model with the best cross-validation performance, retrained on all the training data, and a table that contains the details of the optimization. specify to run the optimization in parallel (requires parallel computing toolbox™).
by default, fitcauto provides a plot of the optimization and an iterative display of the optimization results. for more information on how to interpret these results, see verbose display.
options = struct("optimizer","asha","useparallel",true); [mdl,optimizationresults] = fitcauto(xtrain,ytrain,"hyperparameteroptimizationoptions",options);
warning: it is recommended that you first standardize all numeric predictors when optimizing the naive bayes 'width' parameter. ignore this warning if you have done that.
starting parallel pool (parpool) using the 'local' profile ... connected to the parallel pool (number of workers: 8). copying objective function to workers... done copying objective function to workers. learner types to explore: ensemble, knn, nb, net, svm, tree total iterations (maxobjectiveevaluations): 595 total time (maxtime): inf |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 1 | 8 | best | 0.74165 | 2.2322 | 0.74165 | 271 | tree | minleafsize: 945 | | 2 | 7 | accept | 0.74165 | 9.0692 | 0.049289 | 271 | knn | numneighbors: 1726 | | 3 | 7 | best | 0.049289 | 3.3616 | 0.049289 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 4 | 7 | accept | 0.74165 | 9.2877 | 0.049289 | 271 | knn | numneighbors: 3072 | | 5 | 8 | best | 0.046566 | 0.81486 | 0.046566 | 1084 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 6 | 8 | accept | 0.13379 | 3.0947 | 0.046566 | 271 | knn | numneighbors: 46 | | 7 | 8 | accept | 0.066457 | 13.692 | 0.046566 | 271 | net | activations: sigmoid | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.927e-08 | | | | | | | | | | layersizes: [ 10 56 28 ] | | 8 | 8 | accept | 0.096225 | 3.801 | 0.046566 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 8.8825 | | | | | | | | | | kernelscale: 73.89 | | 9 | 7 | accept | 0.73962 | 14.971 | 0.046566 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 17.562 | | | | | | | | | | kernelscale: 0.0082394 | | 10 | 7 | accept | 0.73925 | 14.98 | 0.046566 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 1.3419 | | | | | | | | | | kernelscale: 0.027033 | | 11 | 8 | accept | 0.74165 | 5.7328 | 0.046566 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.040932 | | | | | | | | | | kernelscale: 949.09 | | 12 | 8 | best | 0.04472 | 3.1496 | 0.04472 | 271 | knn | numneighbors: 2 | | 13 | 8 | accept | 0.74165 | 6.4341 | 0.04472 | 271 | knn | numneighbors: 1240 | | 14 | 8 | best | 0.041536 | 2.2078 | 0.041536 | 271 | knn | numneighbors: 3 | | 15 | 8 | accept | 0.051828 | 2.211 | 0.041536 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 16 | 8 | accept | 0.74165 | 12.471 | 0.041536 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.0079065 | | | | | | | | | | kernelscale: 0.039442 | | 17 | 8 | accept | 0.74165 | 0.88796 | 0.041536 | 271 | tree | minleafsize: 252 | | 18 | 8 | best | 0.029629 | 6.9518 | 0.029629 | 1084 | knn | numneighbors: 2 | | 19 | 8 | accept | 0.030044 | 6.2852 | 0.029629 | 1084 | knn | numneighbors: 3 | | 20 | 8 | accept | 0.74165 | 6.2132 | 0.029629 | 271 | knn | numneighbors: 8117 | |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 21 | 8 | accept | 0.1811 | 2.2815 | 0.029629 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.0052814 | | | | | | | | | | kernelscale: 546.04 | | 22 | 8 | accept | 0.34996 | 4.8703 | 0.029629 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 1.0486 | | | | | | | | | | kernelscale: 2.323 | | 23 | 8 | accept | 0.74165 | 5.7248 | 0.029629 | 271 | knn | numneighbors: 524 | | 24 | 8 | accept | 0.046243 | 1.9627 | 0.029629 | 1084 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 25 | 7 | accept | 0.73057 | 53.598 | 0.029629 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 1.0633e-13 | | 26 | 7 | accept | 0.04209 | 38.18 | 0.029629 | 1084 | net | activations: sigmoid | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.927e-08 | | | | | | | | | | layersizes: [ 10 56 28 ] | | 27 | 8 | accept | 0.035998 | 31.431 | 0.029629 | 271 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.4417e-06 | | | | | | | | | | layersizes: [ 202 11 ] | | 28 | 8 | accept | 0.082103 | 2.5818 | 0.029629 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 1.0839 | | | | | | | | | | kernelscale: 39.504 | | 29 | 8 | accept | 0.032721 | 20.812 | 0.029629 | 271 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 257 | | | | | | | | | | minleafsize: 4 | | | | | | | | | | maxnumsplits: 13 | | 30 | 8 | accept | 0.74165 | 7.0246 | 0.029629 | 271 | knn | numneighbors: 384 | | 31 | 8 | accept | 0.73034 | 49.099 | 0.029629 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 2.0942e-12 | | 32 | 8 | accept | 0.052843 | 1.4947 | 0.029629 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 33 | 8 | best | 0.019522 | 19.771 | 0.019522 | 4334 | knn | numneighbors: 2 | | 34 | 8 | accept | 0.74072 | 10.11 | 0.019522 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.44626 | | | | | | | | | | kernelscale: 0.089894 | | 35 | 8 | accept | 0.10218 | 4.6984 | 0.019522 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 2.8638 | | | | | | | | | | kernelscale: 201.68 | | 36 | 8 | accept | 0.71774 | 68.103 | 0.019522 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 0.00032006 | | 37 | 8 | accept | 0.6913 | 5.0575 | 0.019522 | 271 | knn | numneighbors: 184 | | 38 | 8 | accept | 0.10689 | 2.2859 | 0.019522 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.036995 | | | | | | | | | | kernelscale: 13.878 | | 39 | 8 | accept | 0.72983 | 56.397 | 0.019522 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 2.3638e-05 | | 40 | 8 | accept | 0.035121 | 5.8369 | 0.019522 | 271 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 2.7559e-07 | | | | | | | | | | layersizes: [ 32 93 ] | |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 41 | 8 | accept | 0.048459 | 0.72565 | 0.019522 | 1084 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 42 | 8 | accept | 0.045136 | 0.89703 | 0.019522 | 271 | tree | minleafsize: 6 | | 43 | 8 | accept | 0.11427 | 20.922 | 0.019522 | 271 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 240 | | | | | | | | | | minleafsize: 49 | | | | | | | | | | maxnumsplits: 97 | | 44 | 8 | accept | 0.041674 | 2.8829 | 0.019522 | 271 | knn | numneighbors: 2 | | 45 | 8 | accept | 0.74165 | 5.746 | 0.019522 | 271 | knn | numneighbors: 4410 | | 46 | 8 | accept | 0.019799 | 3.4571 | 0.019522 | 1084 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 2.7559e-07 | | | | | | | | | | layersizes: [ 32 93 ] | | 47 | 8 | accept | 0.030414 | 23.366 | 0.019522 | 1084 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 257 | | | | | | | | | | minleafsize: 4 | | | | | | | | | | maxnumsplits: 13 | | 48 | 8 | accept | 0.049243 | 2.1016 | 0.019522 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 49 | 8 | accept | 0.041767 | 0.83736 | 0.019522 | 271 | tree | minleafsize: 3 | | 50 | 8 | accept | 0.032813 | 4.5548 | 0.019522 | 271 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 223 | | | | | | | | | | minleafsize: 1 | | | | | | | | | | maxnumsplits: 75 | | 51 | 8 | accept | 0.7362 | 11.413 | 0.019522 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 760.57 | | | | | | | | | | kernelscale: 0.34067 | | 52 | 8 | accept | 0.055843 | 0.7704 | 0.019522 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 53 | 8 | accept | 0.028937 | 6.754 | 0.019522 | 1084 | knn | numneighbors: 2 | | 54 | 8 | accept | 0.74165 | 5.6993 | 0.019522 | 271 | knn | numneighbors: 9124 | | 55 | 8 | accept | 0.054689 | 0.75579 | 0.019522 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 56 | 8 | accept | 0.019799 | 8.4671 | 0.019522 | 1084 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 223 | | | | | | | | | | minleafsize: 1 | | | | | | | | | | maxnumsplits: 75 | | 57 | 8 | best | 0.010338 | 22.501 | 0.010338 | 4334 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 2.7559e-07 | | | | | | | | | | layersizes: [ 32 93 ] | | 58 | 8 | accept | 0.12599 | 2.4672 | 0.010338 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.41895 | | | | | | | | | | kernelscale: 96.491 | | 59 | 8 | accept | 0.70357 | 60.43 | 0.010338 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 0.00045097 | | 60 | 8 | accept | 0.5737 | 73.531 | 0.010338 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 0.0018132 | |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 61 | 8 | accept | 0.74165 | 2.1874 | 0.010338 | 271 | net | activations: sigmoid | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 0.019205 | | | | | | | | | | layersizes: [ 3 3 ] | | 62 | 8 | accept | 0.050212 | 1.0089 | 0.010338 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 63 | 8 | accept | 0.027506 | 77.499 | 0.010338 | 1084 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.4417e-06 | | | | | | | | | | layersizes: [ 202 11 ] | | 64 | 8 | accept | 0.030137 | 2.1967 | 0.010338 | 1084 | tree | minleafsize: 3 | | 65 | 8 | accept | 0.74165 | 6.9907 | 0.010338 | 271 | knn | numneighbors: 7694 | | 66 | 8 | accept | 0.73025 | 46.328 | 0.010338 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 7.594e-10 | | 67 | 8 | accept | 0.71742 | 63.01 | 0.010338 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 0.00036683 | | 68 | 8 | accept | 0.029906 | 1.3903 | 0.010338 | 1084 | tree | minleafsize: 6 | | 69 | 8 | accept | 0.090502 | 5.9339 | 0.010338 | 271 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 2.6095e-08 | | | | | | | | | | layersizes: [ 3 16 4 ] | | 70 | 8 | accept | 0.061381 | 2.8978 | 0.010338 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.66386 | | | | | | | | | | kernelscale: 11.66 | | 71 | 8 | accept | 0.037705 | 19.775 | 0.010338 | 271 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 258 | | | | | | | | | | minleafsize: 11 | | | | | | | | | | maxnumsplits: 10 | | 72 | 8 | accept | 0.03849 | 19.504 | 0.010338 | 271 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 6.8643e-05 | | | | | | | | | | layersizes: [ 24 101 14 ] | | 73 | 8 | accept | 0.037152 | 20.796 | 0.010338 | 271 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 275 | | | | | | | | | | minleafsize: 2 | | | | | | | | | | maxnumsplits: 27 | | 74 | 8 | accept | 0.048689 | 2.1741 | 0.010338 | 271 | knn | numneighbors: 4 | | 75 | 8 | accept | 0.55335 | 4.3695 | 0.010338 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.011209 | | | | | | | | | | kernelscale: 1.0514 | | 76 | 8 | accept | 0.032352 | 22.88 | 0.010338 | 1084 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 258 | | | | | | | | | | minleafsize: 11 | | | | | | | | | | maxnumsplits: 10 | | 77 | 8 | best | 0.010061 | 42.264 | 0.010061 | 4334 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 223 | | | | | | | | | | minleafsize: 1 | | | | | | | | | | maxnumsplits: 75 | | 78 | 8 | accept | 0.13125 | 5.0693 | 0.010061 | 271 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.5998e-06 | | | | | | | | | | layersizes: [ 1 3 ] | | 79 | 8 | accept | 0.74165 | 14.599 | 0.010061 | 271 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 216 | | | | | | | | | | minleafsize: 421 | | | | | | | | | | maxnumsplits: 59 | | 80 | 8 | accept | 0.73131 | 46.536 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 1.0852e-11 | |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 81 | 8 | accept | 0.026121 | 27.416 | 0.010061 | 1084 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 275 | | | | | | | | | | minleafsize: 2 | | | | | | | | | | maxnumsplits: 27 | | 82 | 8 | accept | 0.07818 | 2.9308 | 0.010061 | 271 | knn | numneighbors: 15 | | 83 | 8 | accept | 0.64501 | 150.1 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 422.98 | | 84 | 8 | accept | 0.048966 | 0.97418 | 0.010061 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 85 | 8 | accept | 0.74165 | 5.9347 | 0.010061 | 271 | knn | numneighbors: 2792 | | 86 | 8 | accept | 0.050858 | 0.89733 | 0.010061 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 87 | 8 | accept | 0.035444 | 5.8934 | 0.010061 | 1084 | knn | numneighbors: 4 | | 88 | 8 | accept | 0.74165 | 156.96 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 1679.5 | | 89 | 8 | accept | 0.043982 | 1.8291 | 0.010061 | 271 | tree | minleafsize: 3 | | 90 | 8 | accept | 0.080857 | 144.55 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 0.87308 | | 91 | 8 | accept | 0.72956 | 47.076 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 2.7893e-08 | | 92 | 8 | accept | 0.029721 | 1.4922 | 0.010061 | 1084 | tree | minleafsize: 3 | | 93 | 8 | accept | 0.74165 | 0.12917 | 0.010061 | 271 | tree | minleafsize: 7511 | | 94 | 7 | accept | 0.74165 | 6.1437 | 0.010061 | 271 | knn | numneighbors: 9834 | | 95 | 7 | accept | 0.59359 | 73.466 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 0.0015851 | | 96 | 8 | accept | 0.040336 | 0.69244 | 0.010061 | 271 | tree | minleafsize: 1 | | 97 | 7 | accept | 0.042874 | 2.1452 | 0.010061 | 271 | net | activations: relu | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 3.2315e-08 | | | | | | | | | | layersizes: 3 | | 98 | 7 | accept | 0.74165 | 1.2052 | 0.010061 | 271 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 0.3822 | | | | | | | | | | layersizes: [ 27 9 ] | | 99 | 8 | accept | 0.026121 | 1.2028 | 0.010061 | 1084 | tree | minleafsize: 1 | | 100 | 8 | accept | 0.74165 | 0.66984 | 0.010061 | 271 | tree | minleafsize: 1551 | |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 101 | 8 | accept | 0.74165 | 10.343 | 0.010061 | 271 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 223 | | | | | | | | | | minleafsize: 9461 | | | | | | | | | | maxnumsplits: 11 | | 102 | 8 | accept | 0.051505 | 0.82579 | 0.010061 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 103 | 8 | accept | 0.028244 | 46.019 | 0.010061 | 1084 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 6.8643e-05 | | | | | | | | | | layersizes: [ 24 101 14 ] | | 104 | 8 | accept | 0.05612 | 1.9299 | 0.010061 | 271 | knn | numneighbors: 5 | | 105 | 8 | accept | 0.73006 | 44.245 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 1.203e-13 | | 106 | 7 | accept | 0.74165 | 6.0627 | 0.010061 | 271 | knn | numneighbors: 323 | | 107 | 7 | accept | 0.041167 | 3.0942 | 0.010061 | 271 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 7.2382e-05 | | | | | | | | | | layersizes: [ 3 2 ] | | 108 | 8 | accept | 0.66841 | 4.8715 | 0.010061 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 8.4445 | | | | | | | | | | kernelscale: 0.70923 | | 109 | 8 | accept | 0.027321 | 5.5757 | 0.010061 | 1084 | net | activations: relu | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 3.2315e-08 | | | | | | | | | | layersizes: 3 | | 110 | 8 | accept | 0.1343 | 4.1806 | 0.010061 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 2.4202 | | | | | | | | | | kernelscale: 3.4213 | | 111 | 8 | accept | 0.055612 | 0.90595 | 0.010061 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 112 | 8 | accept | 0.019153 | 1.3107 | 0.010061 | 4334 | tree | minleafsize: 1 | | 113 | 8 | accept | 0.048597 | 0.70833 | 0.010061 | 1084 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 114 | 8 | accept | 0.59175 | 0.84241 | 0.010061 | 271 | net | activations: sigmoid | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.0815 | | | | | | | | | | layersizes: 150 | | 115 | 8 | accept | 0.54006 | 4.17 | 0.010061 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.029391 | | | | | | | | | | kernelscale: 1.121 | | 116 | 8 | accept | 0.74165 | 6.5172 | 0.010061 | 271 | knn | numneighbors: 2873 | | 117 | 8 | accept | 0.024091 | 7.1168 | 0.010061 | 1084 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 7.2382e-05 | | | | | | | | | | layersizes: [ 3 2 ] | | 118 | 8 | accept | 0.027368 | 10.135 | 0.010061 | 271 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 216 | | | | | | | | | | minleafsize: 2 | | | | | | | | | | maxnumsplits: 42 | | 119 | 8 | accept | 0.027598 | 46.175 | 0.010061 | 4334 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 275 | | | | | | | | | | minleafsize: 2 | | | | | | | | | | maxnumsplits: 27 | | 120 | 8 | accept | 0.12701 | 3.4389 | 0.010061 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 19.581 | | | | | | | | | | kernelscale: 2.5698 | |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 121 | 8 | accept | 0.74165 | 5.7497 | 0.010061 | 271 | knn | numneighbors: 3004 | | 122 | 8 | accept | 0.051551 | 0.98458 | 0.010061 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 123 | 8 | accept | 0.73934 | 10.379 | 0.010061 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 6.66 | | | | | | | | | | kernelscale: 0.0075876 | | 124 | 8 | accept | 0.74165 | 6.0464 | 0.010061 | 271 | knn | numneighbors: 538 | | 125 | 8 | accept | 0.051643 | 0.94588 | 0.010061 | 1084 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 126 | 8 | accept | 0.050074 | 0.66389 | 0.010061 | 271 | tree | minleafsize: 8 | | 127 | 8 | accept | 0.51948 | 11.015 | 0.010061 | 271 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 245 | | | | | | | | | | minleafsize: 103 | | | | | | | | | | maxnumsplits: 30 | | 128 | 8 | accept | 0.054966 | 0.59455 | 0.010061 | 271 | tree | minleafsize: 19 | | 129 | 8 | accept | 0.068765 | 2.1334 | 0.010061 | 271 | knn | numneighbors: 12 | | 130 | 8 | accept | 0.031613 | 1.5598 | 0.010061 | 1084 | tree | minleafsize: 8 | | 131 | 8 | accept | 0.018414 | 20.732 | 0.010061 | 1084 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 216 | | | | | | | | | | minleafsize: 2 | | | | | | | | | | maxnumsplits: 42 | | 132 | 8 | accept | 0.73874 | 9.856 | 0.010061 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.37029 | | | | | | | | | | kernelscale: 0.28264 | | 133 | 8 | accept | 0.044813 | 1.4812 | 0.010061 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 187.62 | | | | | | | | | | kernelscale: 55.462 | | 134 | 8 | accept | 0.74165 | 0.39159 | 0.010061 | 271 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.3833 | | | | | | | | | | layersizes: [ 7 3 ] | | 135 | 8 | accept | 0.69134 | 7.5927 | 0.010061 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.90862 | | | | | | | | | | kernelscale: 1.0317 | | 136 | 8 | accept | 0.022568 | 2.2974 | 0.010061 | 1084 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 187.62 | | | | | | | | | | kernelscale: 55.462 | | 137 | 8 | accept | 0.029352 | 19.821 | 0.010061 | 271 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 268 | | | | | | | | | | minleafsize: 1 | | | | | | | | | | maxnumsplits: 79 | | 138 | 8 | accept | 0.74165 | 5.6724 | 0.010061 | 271 | knn | numneighbors: 4444 | | 139 | 8 | accept | 0.056443 | 0.6542 | 0.010061 | 271 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 140 | 8 | accept | 0.74165 | 8.0385 | 0.010061 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.0043989 | | | | | | | | | | kernelscale: 0.36557 | |====================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | training set | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | size | | | |====================================================================================================================================================| | 141 | 8 | accept | 0.73066 | 46.903 | 0.010061 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 1.1477e-12 | | 142 | 8 | accept | 0.015784 | 31.487 | 0.010061 | 4334 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 7.2382e-05 | | | | | | | | | | layersizes: [ 3 2 ] | | 143 | 8 | accept | 0.028567 | 13.713 | 0.010061 | 271 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 213 | | | | | | | | | | minleafsize: 7 | | | | | | | | | | maxnumsplits: 82 | | 144 | 8 | accept | 0.62622 | 3.8393 | 0.010061 | 271 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.0037069 | | | | | | | | | | kernelscale: 0.81773 | | 145 | 8 | accept | 0.025014 | 27.536 | 0.010061 | 1084 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 268 | | | | | | | | | | minleafsize: 1 | | | | | | | | | | maxnumsplits: 79 | | 146 | 8 | best | 0.0038767 | 74.175 | 0.0038767 | 17335 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 223 | | | | | | | | | | minleafsize: 1 | | | | | | | | | | maxnumsplits: 75 | | 147 | 8 | accept | 0.74165 | 4.4671 | 0.0038767 | 271 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.052342 | | | | | | | | | | kernelscale: 305.83 | | 148 | 8 | accept | 0.082795 | 2.2053 | 0.0038767 | 271 | knn | numneighbors: 20 | | 149 | 8 | accept | 0.57647 | 153.17 | 0.0038767 | 271 | nb | distributionnames: kernel | | | | | | | | | | width: 200.41 | | 150 | 8 | accept | 0.041767 | 7.58 | 0.0038767 | 271 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 0.0095919 | | | | | | | | | | layersizes: [ 89 3 ] | | 151 | 8 | accept | 0.018276 | 18.316 | 0.0038767 | 1084 | ensemble | method: adaboostm2 | | | ...
__________________________________________________________ optimization completed. total iterations: 595 total elapsed time: 1276.4375 seconds total time for training and validation: 9777.0453 seconds best observed learner is an ensemble model with: learner: ensemble method: adaboostm2 numlearningcycles: 223 minleafsize: 1 maxnumsplits: 75 observed validation loss: 0.0038767 time for training and validation: 74.175 seconds documentation for fitcauto display
the final model returned by fitcauto corresponds to the best observed learner. before returning the model, the function retrains it using all the training data (xtrain and ytrain), the listed learner (or model) type, and the displayed hyperparameter values.
evaluate test set performance
evaluate the final model performance on the test data set.
testaccuracy = 1 - loss(mdl,xtest,ytest)
testaccuracy = 0.9958
the final model correctly classifies over 99% of the observations.
combine feature selection and automated classifier selection
use fitcauto to automatically select a classification model with optimized hyperparameters, given predictor and response data stored in a table. before passing data to fitcauto, perform feature selection to remove unimportant predictors from the data set.
load and partition data
read the sample file creditrating_historical.dat into a table. the predictor data consists of financial ratios and industry sector information for a list of corporate customers. the response variable consists of credit ratings assigned by a rating agency. preview the first few rows of the data set.
creditrating = readtable("creditrating_historical.dat");
head(creditrating)ans=8×8 table
id wc_ta re_ta ebit_ta mve_bvtd s_ta industry rating
_____ ______ ______ _______ ________ _____ ________ _______
62394 0.013 0.104 0.036 0.447 0.142 3 {'bb' }
48608 0.232 0.335 0.062 1.969 0.281 8 {'a' }
42444 0.311 0.367 0.074 1.935 0.366 1 {'a' }
48631 0.194 0.263 0.062 1.017 0.228 4 {'bbb'}
43768 0.121 0.413 0.057 3.647 0.466 12 {'aaa'}
39255 -0.117 -0.799 0.01 0.179 0.082 4 {'ccc'}
62236 0.087 0.158 0.049 0.816 0.324 2 {'bbb'}
39354 0.005 0.181 0.034 2.597 0.388 7 {'aa' }
because each value in the id variable is a unique customer id, that is, length(unique(creditrating.id)) is equal to the number of observations in creditrating, the id variable is a poor predictor. remove the id variable from the table, and convert the industry variable to a categorical variable.
creditrating = removevars(creditrating,"id");
creditrating.industry = categorical(creditrating.industry);partition the data into training and test sets. use approximately 85% of the observations for the model selection and hyperparameter tuning process, and 15% of the observations to test the performance of the final model returned by fitcauto on new data. use cvpartition to partition the data.
rng("default") % for reproducibility of the partition c = cvpartition(creditrating.rating,"holdout",0.15); trainingindices = training(c); % indices for the training set testindices = test(c); % indices for the test set credittrain = creditrating(trainingindices,:); credittest = creditrating(testindices,:);
perform feature selection
before passing the training data to fitcauto, find the important predictors by using the fscchi2 function. visualize the predictor scores by using the bar function. because some scores can be inf, and bar discards inf values, plot the finite scores first and then plot a finite representation of the inf scores in a different color.
[idx,scores] = fscchi2(credittrain,"rating"); bar(scores(idx)) % represents finite scores hold on veryimportant = isinf(scores); finitemax = max(scores(~veryimportant)); bar(finitemax*veryimportant(idx)) % represents inf scores hold off xticklabels(strrep(credittrain.properties.variablenames(idx),"_","\_")) xtickangle(45) legend(["finite scores","inf scores"])
notice that the industry predictor has a low score corresponding to a p-value that is greater than 0.05, which indicates that industry might not be an important feature. remove the industry feature from the training and test data sets.
credittrain = removevars(credittrain,'industry'); credittest = removevars(credittest,'industry');
run fitcauto
pass the training data to fitcauto. the function uses bayesian optimization to select models and their hyperparameter values, and returns a trained model mdl with the best expected performance. specify to try all available learner types and run the optimization in parallel (requires parallel computing toolbox™). return a second output results that contains the details of the bayesian optimization.
expect this process to take some time. by default, fitcauto provides a plot of the optimization and an iterative display of the optimization results. for more information on how to interpret these results, see verbose display.
options = struct("useparallel",true); [mdl,results] = fitcauto(credittrain,"rating", ... "learners","all","hyperparameteroptimizationoptions",options);
warning: it is recommended that you first standardize all numeric predictors when optimizing the naive bayes 'width' parameter. ignore this warning if you have done that.
copying objective function to workers...
warning: files that have already been attached are being ignored. to see which files are attached see the 'attachedfiles' property of the parallel pool.
done copying objective function to workers. learner types to explore: discr, ensemble, kernel, knn, linear, nb, net, svm, tree total iterations (maxobjectiveevaluations): 270 total time (maxtime): inf |=======================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | validation loss | | | |=======================================================================================================================================================| | 1 | 7 | best | 0.31798 | 0.78014 | 0.31798 | 0.31798 | tree | minleafsize: 1 | | 2 | 7 | accept | 0.47622 | 0.76358 | 0.31798 | 0.31798 | knn | numneighbors: 63 | | | | | | | | | | distance: correlation | | 3 | 3 | accept | 0.42896 | 0.95281 | 0.31798 | 0.31798 | discr | delta: 1.5003e-06 | | | | | | | | | | gamma: 0.47392 | | 4 | 3 | accept | 0.74185 | 0.99139 | 0.31798 | 0.31798 | discr | delta: 389.85 | | | | | | | | | | gamma: 0.29596 | | 5 | 3 | accept | 0.7236 | 1.0177 | 0.31798 | 0.31798 | knn | numneighbors: 599 | | | | | | | | | | distance: hamming | | 6 | 3 | accept | 0.5848 | 2.195 | 0.31798 | 0.31798 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.84619 | | | | | | | | | | kernelscale: 19.346 | | 7 | 3 | accept | 0.74185 | 2.3486 | 0.31798 | 0.31798 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.0052084 | | | | | | | | | | kernelscale: 128.61 | | 8 | 8 | best | 0.28059 | 0.30573 | 0.28059 | 0.28059 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 9 | 6 | accept | 0.74215 | 6.4474 | 0.28059 | 0.28059 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 0.028123 | | | | | | | | | | lambda: 0.016312 | | 10 | 6 | accept | 0.74185 | 1.0242 | 0.28059 | 0.28059 | knn | numneighbors: 1052 | | | | | | | | | | distance: jaccard | | 11 | 6 | accept | 0.38618 | 1.1643 | 0.28059 | 0.28059 | knn | numneighbors: 8 | | | | | | | | | | distance: mahalanobis | | 12 | 5 | accept | 0.76967 | 1.9214 | 0.28059 | 0.29713 | ensemble | method: rusboost | | | | | | | | | | numlearningcycles: 14 | | | | | | | | | | learnrate: 0.0069636 | | | | | | | | | | minleafsize: 230 | | 13 | 5 | accept | 0.3096 | 2.4447 | 0.28059 | 0.29713 | nb | distributionnames: kernel | | | | | | | | | | width: 0.45485 | | 14 | 8 | accept | 0.40532 | 1.6213 | 0.28059 | 0.29713 | linear | coding: onevsall | | | | | | | | | | lambda: 0.00047099 | | | | | | | | | | learner: logistic | | 15 | 7 | accept | 0.74185 | 4.2042 | 0.28059 | 0.29713 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 20.46 | | | | | | | | | | lambda: 0.081223 | | 16 | 7 | accept | 0.48011 | 0.83491 | 0.28059 | 0.29713 | linear | coding: onevsall | | | | | | | | | | lambda: 0.0012929 | | | | | | | | | | learner: svm | | 17 | 4 | accept | 0.379 | 7.0624 | 0.24978 | 0.31798 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 156.99 | | | | | | | | | | lambda: 7.336e-06 | | 18 | 4 | best | 0.24978 | 2.7256 | 0.24978 | 0.31798 | linear | coding: onevsone | | | | | | | | | | lambda: 1.3809e-08 | | | | | | | | | | learner: logistic | | 19 | 4 | accept | 0.25067 | 1.5777 | 0.24978 | 0.31798 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 80.452 | | | | | | | | | | kernelscale: 20.931 | | 20 | 4 | accept | 0.68112 | 2.197 | 0.24978 | 0.31798 | nb | distributionnames: kernel | | | | | | | | | | width: 3.3045 | |=======================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | validation loss | | | |=======================================================================================================================================================| | 21 | 8 | best | 0.24319 | 2.5177 | 0.24319 | 0.31798 | linear | coding: onevsone | | | | | | | | | | lambda: 7.4269e-05 | | | | | | | | | | learner: svm | | 22 | 5 | accept | 0.24559 | 2.5222 | 0.24319 | 0.31798 | linear | coding: onevsone | | | | | | | | | | lambda: 9.6858e-06 | | | | | | | | | | learner: svm | | 23 | 5 | accept | 0.26653 | 0.28511 | 0.24319 | 0.31798 | tree | minleafsize: 61 | | 24 | 5 | accept | 0.66647 | 0.40489 | 0.24319 | 0.31798 | knn | numneighbors: 81 | | | | | | | | | | distance: hamming | | 25 | 5 | accept | 0.28059 | 0.19167 | 0.24319 | 0.31798 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 26 | 7 | accept | 0.24499 | 2.1437 | 0.24319 | 0.31798 | linear | coding: onevsone | | | | | | | | | | lambda: 0.0014257 | | | | | | | | | | learner: svm | | 27 | 7 | accept | 0.28059 | 0.19273 | 0.24319 | 0.31798 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 28 | 6 | accept | 0.26503 | 0.31492 | 0.24319 | 0.31798 | tree | minleafsize: 41 | | 29 | 6 | accept | 0.74185 | 0.86991 | 0.24319 | 0.31798 | net | activations: relu | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 19.947 | | | | | | | | | | layersizes: [ 12 9 162 ] | | 30 | 6 | accept | 0.71523 | 1.7617 | 0.24319 | 0.27687 | linear | coding: onevsone | | | | | | | | | | lambda: 7.8161 | | | | | | | | | | learner: svm | | 31 | 7 | accept | 0.31289 | 0.29991 | 0.24319 | 0.27687 | knn | numneighbors: 12 | | | | | | | | | | distance: seuclidean | | 32 | 7 | accept | 0.31289 | 0.23823 | 0.24319 | 0.27687 | knn | numneighbors: 12 | | | | | | | | | | distance: seuclidean | | 33 | 6 | accept | 0.77984 | 11.017 | 0.24319 | 0.27687 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 0.0048668 | | | | | | | | | | lambda: 6.1392e-06 | | 34 | 6 | accept | 0.31289 | 0.18884 | 0.24319 | 0.27687 | knn | numneighbors: 12 | | | | | | | | | | distance: seuclidean | | 35 | 5 | accept | 0.78612 | 3.896 | 0.24319 | 0.27687 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 0.0016754 | | | | | | | | | | lambda: 6.6323e-06 | | 36 | 5 | accept | 0.74185 | 0.47636 | 0.24319 | 0.27687 | discr | delta: 30.053 | | | | | | | | | | gamma: 0.73742 | | 37 | 8 | accept | 0.26443 | 0.12865 | 0.24319 | 0.27532 | tree | minleafsize: 33 | | 38 | 5 | accept | 0.32276 | 0.13117 | 0.24319 | 0.27532 | tree | minleafsize: 328 | | 39 | 5 | accept | 0.28059 | 0.17681 | 0.24319 | 0.27532 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 40 | 5 | accept | 0.71702 | 0.44235 | 0.24319 | 0.27532 | discr | delta: 4.3736 | | | | | | | | | | gamma: 0.086011 | |=======================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | validation loss | | | |=======================================================================================================================================================| | 41 | 5 | accept | 0.25755 | 0.30003 | 0.24319 | 0.27532 | knn | numneighbors: 17 | | | | | | | | | | distance: cityblock | | 42 | 8 | accept | 0.58989 | 1.8892 | 0.24319 | 0.27532 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 2.3154 | | | | | | | | | | lambda: 0.17755 | | 43 | 8 | best | 0.23961 | 1.8068 | 0.23961 | 0.27532 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 1.6804 | | | | | | | | | | kernelscale: 0.69915 | | 44 | 8 | accept | 0.52019 | 3.4078 | 0.23961 | 0.27532 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.0020203 | | | | | | | | | | kernelscale: 4.9323 | | 45 | 8 | accept | 0.39844 | 1.2275 | 0.23961 | 0.27532 | linear | coding: onevsall | | | | | | | | | | lambda: 0.000245 | | | | | | | | | | learner: logistic | | 46 | 7 | accept | 0.29345 | 3.2203 | 0.23961 | 0.28001 | ensemble | method: rusboost | | | | | | | | | | numlearningcycles: 11 | | | | | | | | | | learnrate: 0.0037912 | | | | | | | | | | minleafsize: 3 | | 47 | 7 | accept | 0.28597 | 0.24422 | 0.23961 | 0.28001 | tree | minleafsize: 10 | | 48 | 8 | accept | 0.24828 | 2.1892 | 0.23961 | 0.26397 | linear | coding: onevsone | | | | | | | | | | lambda: 3.0856e-06 | | | | | | | | | | learner: logistic | | 49 | 7 | accept | 0.42776 | 0.87452 | 0.23961 | 0.26397 | discr | delta: 0.00024246 | | | | | | | | | | gamma: 0.94088 | | 50 | 7 | accept | 0.42776 | 0.73959 | 0.23961 | 0.26397 | discr | delta: 0.00024246 | | | | | | | | | | gamma: 0.94088 | | 51 | 6 | accept | 0.85372 | 22.106 | 0.23961 | 0.26397 | ensemble | method: rusboost | | | | | | | | | | numlearningcycles: 335 | | | | | | | | | | learnrate: 0.0029421 | | | | | | | | | | minleafsize: 418 | | 52 | 6 | accept | 0.26982 | 0.13679 | 0.23961 | 0.26397 | tree | minleafsize: 17 | | 53 | 6 | accept | 0.74185 | 0.39262 | 0.23961 | 0.26397 | net | activations: sigmoid | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 18.22 | | | | | | | | | | layersizes: [ 18 7 ] | | 54 | 7 | accept | 0.28059 | 0.16664 | 0.23961 | 0.26397 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 55 | 7 | accept | 0.28059 | 0.12859 | 0.23961 | 0.26397 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 56 | 7 | accept | 0.28059 | 0.11931 | 0.23961 | 0.26397 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 57 | 7 | accept | 0.43703 | 0.12446 | 0.23961 | 0.26397 | discr | delta: 0.38801 | | | | | | | | | | gamma: 0.19442 | | 58 | 6 | accept | 0.49028 | 18.139 | 0.23961 | 0.26397 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 1.0284 | | | | | | | | | | kernelscale: 0.066897 | | 59 | 6 | accept | 0.74185 | 0.41221 | 0.23961 | 0.26397 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.1378 | | | | | | | | | | layersizes: [ 58 2 ] | | 60 | 6 | accept | 0.49447 | 0.84836 | 0.23961 | 0.27351 | linear | coding: onevsall | | | | | | | | | | lambda: 3.1837e-07 | | | | | | | | | | learner: svm | |=======================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | validation loss | | | |=======================================================================================================================================================| | 61 | 7 | accept | 0.70117 | 0.17095 | 0.23961 | 0.27351 | knn | numneighbors: 1 | | | | | | | | | | distance: hamming | | 62 | 7 | accept | 0.70117 | 0.17044 | 0.23961 | 0.27351 | knn | numneighbors: 1 | | | | | | | | | | distance: hamming | | 63 | 7 | accept | 0.4819 | 0.16752 | 0.23961 | 0.27351 | knn | numneighbors: 15 | | | | | | | | | | distance: correlation | | 64 | 8 | accept | 0.24469 | 2.4156 | 0.23961 | 0.26436 | linear | coding: onevsone | | | | | | | | | | lambda: 1.0606e-06 | | | | | | | | | | learner: svm | | 65 | 7 | accept | 0.27251 | 1.4945 | 0.23961 | 0.26436 | nb | distributionnames: kernel | | | | | | | | | | width: 0.016406 | | 66 | 7 | accept | 0.27251 | 1.5369 | 0.23961 | 0.26436 | nb | distributionnames: kernel | | | | | | | | | | width: 0.016406 | | 67 | 8 | accept | 0.3102 | 1.6327 | 0.23961 | 0.26436 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.66555 | | | | | | | | | | kernelscale: 7.7425 | | 68 | 7 | accept | 0.31798 | 0.31217 | 0.23961 | 0.26436 | tree | minleafsize: 1 | | 69 | 7 | accept | 0.31798 | 0.1989 | 0.23961 | 0.26436 | tree | minleafsize: 1 | | 70 | 8 | accept | 0.7239 | 2.2998 | 0.23961 | 0.26436 | nb | distributionnames: kernel | | | | | | | | | | width: 7.994 | | 71 | 8 | accept | 0.26982 | 0.16298 | 0.23961 | 0.26436 | tree | minleafsize: 17 | | 72 | 7 | accept | 0.4843 | 2.8168 | 0.23961 | 0.26436 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.033141 | | | | | | | | | | kernelscale: 0.28115 | | 73 | 7 | accept | 0.4843 | 2.8684 | 0.23961 | 0.26436 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.033141 | | | | | | | | | | kernelscale: 0.28115 | | 74 | 8 | accept | 0.25157 | 17.917 | 0.23961 | 0.26436 | net | activations: tanh | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 1.7369e-06 | | | | | | | | | | layersizes: 8 | | 75 | 8 | accept | 0.28059 | 0.14319 | 0.23961 | 0.26436 | nb | distributionnames: normal | | | | | | | | | | width: nan | | 76 | 8 | accept | 0.27401 | 5.2171 | 0.23961 | 0.26436 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 6.8476 | | | | | | | | | | lambda: 0.00036546 | | 77 | 8 | accept | 0.24678 | 5.4758 | 0.23961 | 0.26436 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 1.6458 | | | | | | | | | | lambda: 0.00029076 | | 78 | 8 | accept | 0.24768 | 15.469 | 0.23961 | 0.26436 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 1.6458 | | | | | | | | | | lambda: 0.00029076 | | 79 | 8 | accept | 0.74185 | 2.8161 | 0.23961 | 0.26436 | nb | distributionnames: kernel | | | | | | | | | | width: 57.408 | | 80 | 8 | accept | 0.26683 | 16.599 | 0.23961 | 0.26436 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 356 | | | | | | | | | | learnrate: 0.4849 | | | | | | | | | | minleafsize: 190 | |=======================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | validation loss | | | |=======================================================================================================================================================| | 81 | 8 | accept | 0.43045 | 0.14072 | 0.23961 | 0.26436 | discr | delta: 5.5966e-05 | | | | | | | | | | gamma: 0.72927 | | 82 | 8 | accept | 0.42806 | 0.11498 | 0.23961 | 0.26436 | discr | delta: 0.014062 | | | | | | | | | | gamma: 0.11412 | | 83 | 7 | accept | 0.34699 | 17.983 | 0.23961 | 0.26436 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 0.15793 | | | | | | | | | | lambda: 3.4157e-07 | | 84 | 7 | accept | 0.26713 | 0.14254 | 0.23961 | 0.26436 | tree | minleafsize: 37 | | 85 | 8 | accept | 0.25067 | 0.34385 | 0.23961 | 0.26436 | knn | numneighbors: 107 | | | | | | | | | | distance: euclidean | | 86 | 8 | accept | 0.25067 | 0.3674 | 0.23961 | 0.26436 | knn | numneighbors: 107 | | | | | | | | | | distance: euclidean | | 87 | 8 | accept | 0.25456 | 0.12393 | 0.23961 | 0.26436 | knn | numneighbors: 21 | | | | | | | | | | distance: euclidean | | 88 | 8 | accept | 0.42866 | 0.16366 | 0.23961 | 0.26436 | discr | delta: 0.010446 | | | | | | | | | | gamma: 0.45787 | | 89 | 8 | accept | 0.42746 | 7.739 | 0.23961 | 0.26436 | net | activations: none | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 0.012033 | | | | | | | | | | layersizes: [ 36 71 224 ] | | 90 | 8 | accept | 0.42148 | 0.1231 | 0.23961 | 0.26436 | discr | delta: 6.5069e-06 | | | | | | | | | | gamma: 0.035196 | | 91 | 8 | accept | 0.2402 | 4.845 | 0.23961 | 0.26436 | net | activations: none | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 0.00031695 | | | | | | | | | | layersizes: [ 1 1 4 ] | | 92 | 7 | accept | 0.25337 | 4.0368 | 0.23961 | 0.26436 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 87 | | | | | | | | | | learnrate: 0.72655 | | | | | | | | | | minleafsize: 8 | | 93 | 7 | accept | 0.29076 | 1.476 | 0.23961 | 0.26436 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 6.1463 | | | | | | | | | | kernelscale: 11.586 | | 94 | 8 | accept | 0.24858 | 2.4734 | 0.23961 | 0.25191 | linear | coding: onevsone | | | | | | | | | | lambda: 5.8564e-07 | | | | | | | | | | learner: logistic | | 95 | 8 | accept | 0.75381 | 2.7208 | 0.23961 | 0.25191 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 0.0011931 | | | | | | | | | | lambda: 0.0021196 | | 96 | 8 | accept | 0.74514 | 2.5576 | 0.23961 | 0.25191 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 0.0011931 | | | | | | | | | | lambda: 0.0021196 | | 97 | 8 | accept | 0.2423 | 1.4238 | 0.23961 | 0.25191 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.037756 | | | | | | | | | | kernelscale: 0.054479 | | 98 | 7 | accept | 0.24529 | 72.651 | 0.23961 | 0.25191 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.092471 | | | | | | | | | | kernelscale: 0.0035999 | | 99 | 7 | accept | 0.32605 | 1.0318 | 0.23961 | 0.25191 | nb | distributionnames: kernel | | | | | | | | | | width: 0.002311 | | 100 | 7 | accept | 0.26683 | 0.11759 | 0.23961 | 0.25191 | tree | minleafsize: 60 | |=======================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | validation loss | | | |=======================================================================================================================================================| | 101 | 7 | accept | 0.31738 | 0.73567 | 0.23961 | 0.25191 | knn | numneighbors: 440 | | | | | | | | | | distance: minkowski | | 102 | 8 | accept | 0.24619 | 2.8761 | 0.23961 | 0.25191 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.051313 | | | | | | | | | | kernelscale: 0.018609 | | 103 | 8 | accept | 0.24619 | 2.8825 | 0.23961 | 0.25191 | svm | coding: onevsone | | | | | | | | | | boxconstraint: 0.051313 | | | | | | | | | | kernelscale: 0.018609 | | 104 | 8 | accept | 0.31798 | 0.18993 | 0.23961 | 0.25191 | knn | numneighbors: 30 | | | | | | | | | | distance: seuclidean | | 105 | 8 | accept | 0.27251 | 7.5016 | 0.23961 | 0.25191 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 2.0044 | | | | | | | | | | lambda: 0.00044252 | | 106 | 8 | accept | 0.25606 | 2.4574 | 0.23961 | 0.25191 | ensemble | method: adaboostm2 | | | | | | | | | | numlearningcycles: 47 | | | | | | | | | | learnrate: 0.37809 | | | | | | | | | | minleafsize: 56 | | 107 | 8 | accept | 0.71702 | 0.11134 | 0.23961 | 0.25191 | discr | delta: 4.4097 | | | | | | | | | | gamma: 0.8883 | | 108 | 8 | accept | 0.43195 | 0.10201 | 0.23961 | 0.25191 | discr | delta: 3.4149e-06 | | | | | | | | | | gamma: 0.66863 | | 109 | 8 | accept | 0.5851 | 0.16296 | 0.23961 | 0.25191 | knn | numneighbors: 1 | | | | | | | | | | distance: correlation | | 110 | 8 | accept | 0.3102 | 120.87 | 0.23961 | 0.25191 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 1.2141e-07 | | | | | | | | | | layersizes: 157 | | 111 | 7 | accept | 0.79958 | 4.0886 | 0.23961 | 0.25431 | kernel | coding: onevsall | | | | | | | | | | kernelscale: 0.005193 | | | | | | | | | | lambda: 8.7114e-07 | | 112 | 7 | accept | 0.48998 | 1.3636 | 0.23961 | 0.25431 | linear | coding: onevsall | | | | | | | | | | lambda: 1.0966e-07 | | | | | | | | | | learner: svm | | 113 | 8 | accept | 0.36464 | 126.9 | 0.23961 | 0.25431 | net | activations: tanh | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 7.078e-08 | | | | | | | | | | layersizes: [ 85 74 ] | | 114 | 8 | accept | 0.45319 | 139.01 | 0.23961 | 0.25431 | svm | coding: onevsall | | | | | | | | | | boxconstraint: 0.049562 | | | | | | | | | | kernelscale: 0.019349 | | 115 | 7 | accept | 0.24379 | 18.913 | 0.23961 | 0.25431 | net | activations: sigmoid | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 5.0497e-07 | | | | | | | | | | layersizes: [ 1 4 5 ] | | 116 | 7 | accept | 0.42836 | 1.076 | 0.23961 | 0.25431 | discr | delta: 0.0016971 | | | | | | | | | | gamma: 0.35943 | | 117 | 6 | accept | 0.24319 | 20.917 | 0.23961 | 0.25622 | net | activations: sigmoid | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 5.0497e-07 | | | | | | | | | | layersizes: [ 1 4 5 ] | | 118 | 6 | accept | 0.46814 | 1.0997 | 0.23961 | 0.25622 | linear | coding: onevsall | | | | | | | | | | lambda: 7.5025e-05 | | | | | | | | | | learner: svm | | 119 | 8 | accept | 0.74065 | 2.2714 | 0.23961 | 0.25622 | nb | distributionnames: kernel | | | | | | | | | | width: 19.139 | | 120 | 8 | accept | 0.30302 | 0.17067 | 0.23961 | 0.25622 | tree | minleafsize: 191 | |=======================================================================================================================================================| | iter | active | eval | validation | time for training | observed min | estimated min | learner | hyperparameter: value | | | workers | result | loss | & validation (sec)| validation loss | validation loss | | | |=======================================================================================================================================================| | 121 | 8 | accept | 0.26593 | 0.11582 | 0.23961 | 0.25622 | tree | minleafsize: 40 | | 122 | 8 | accept | 0.47712 | 0.68686 | 0.23961 | 0.25178 | linear | coding: onevsall | | | | | | | | | | lambda: 0.2622 | | | | | | | | | | learner: svm | | 123 | 8 | accept | 0.24798 | 8.1465 | 0.23961 | 0.25178 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 85 | | | | | | | | | | learnrate: nan | | | | | | | | | | minleafsize: 14 | | 124 | 6 | accept | 0.29554 | 48.462 | 0.23961 | 0.25178 | net | activations: relu | | | | | | | | | | standardize: true | | | | | | | | | | lambda: 5.8633e-09 | | | | | | | | | | layersizes: 115 | | 125 | 6 | accept | 0.24978 | 8.4739 | 0.23961 | 0.25178 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 85 | | | | | | | | | | learnrate: nan | | | | | | | | | | minleafsize: 14 | | 126 | 6 | accept | 0.25157 | 8.422 | 0.23961 | 0.25178 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 85 | | | | | | | | | | learnrate: nan | | | | | | | | | | minleafsize: 14 | | 127 | 6 | accept | 0.25815 | 1.9238 | 0.23961 | 0.25178 | nb | distributionnames: kernel | | | | | | | | | | width: 0.062941 | | 128 | 6 | accept | 0.24948 | 2.291 | 0.23961 | 0.25148 | linear | coding: onevsone | | | | | | | | | | lambda: 1.2391e-07 | | | | | | | | | | learner: logistic | | 129 | 8 | accept | 0.28118 | 5.9878 | 0.23961 | 0.25148 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 82 | | | | | | | | | | learnrate: nan | | | | | | | | | | minleafsize: 153 | | 130 | 8 | accept | 0.29644 | 8.8037 | 0.23961 | 0.25148 | ensemble | method: rusboost | | | | | | | | | | numlearningcycles: 85 | | | | | | | | | | learnrate: 0.56002 | | | | | | | | | | minleafsize: 8 | | 131 | 7 | accept | 0.39785 | 8.9125 | 0.23961 | 0.25148 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 0.10138 | | | | | | | | | | lambda: 0.00010013 | | 132 | 7 | accept | 0.28298 | 6.7573 | 0.23961 | 0.25148 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 81 | | | | | | | | | | learnrate: nan | | | | | | | | | | minleafsize: 151 | | 133 | 8 | accept | 0.27371 | 6.3282 | 0.23961 | 0.25148 | ensemble | method: bag | | | | | | | | | | numlearningcycles: 84 | | | | | | | | | | learnrate: nan | | | | | | | | | | minleafsize: 129 | | 134 | 8 | accept | 0.24559 | 76.492 | 0.23961 | 0.25148 | net | activations: sigmoid | | | | | | | | | | standardize: false | | | | | | | | | | lambda: 2.4405e-07 | | | | | | | | | | layersizes: [ 33 17 82 ] | | 135 | 7 | accept | 0.34819 | 16.667 | 0.23961 | 0.25148 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 0.12039 | | | | | | | | | | lambda: 0.00010483 | | 136 | 7 | accept | 0.42477 | 8.2081 | 0.23961 | 0.25148 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 0.095799 | | | | | | | | | | lambda: 8.6717e-05 | | 137 | 6 | accept | 0.25007 | 4.8241 | 0.23961 | 0.25148 | kernel | coding: onevsone | | | | | | | | | | kernelscale: 0.54593 | | | | | | | | | | lambda: 0.0017131 | | 138 | 6 | accept | 0.74185 | 0.75998 | 0.23961 | 0.25148 | net | activations: sigmoid | | | | | | ...
__________________________________________________________ optimization completed. total iterations: 271 total elapsed time: 907.7117 seconds total time for training and validation: 5400.9893 seconds best observed learner is a net model with: learner: net activations: relu standardize: false lambda: 0.0004658 layersizes: [1 31 23] observed validation loss: 0.23811 time for training and validation: 21.2958 seconds best estimated learner (returned model) is a net model with: learner: net activations: none standardize: false lambda: 0.00036647 layersizes: [1 6 10] estimated validation loss: 0.24112 estimated time for training and validation: 5.894 seconds documentation for fitcauto display
the final model returned by fitcauto corresponds to the best estimated learner. before returning the model, the function retrains it using the entire training data (credittrain), the listed learner (or model) type, and the displayed hyperparameter values.
evaluate test set performance
the model mdl corresponds to the best point in the bayesian optimization according to the "min-visited-mean" criterion. to gauge how the model will perform on new data, look at the observed cross-validation accuracy of the model (cvaccuracy) and its general estimated performance based on the bayesian optimization (estimatedaccuracy).
[x,~,iteration] = bestpoint(results,"criterion","min-visited-mean"); cverror = results.objectivetrace(iteration); cvaccuracy = 1 - cverror
cvaccuracy = 0.7595
estimatederror = predictobjective(results,x); estimatedaccuracy = 1 - estimatederror
estimatedaccuracy = 0.7589
evaluate the performance of the model on the test set. create a confusion matrix from the results, and specify the order of the classes in the confusion matrix.
testaccuracy = 1 - loss(mdl,credittest,"rating")testaccuracy = 0.7437
cm = confusionchart(credittest.rating,predict(mdl,credittest)); sortclasses(cm,["aaa","aa","a","bbb","bb","b","ccc"])
input arguments
output arguments
more about
tips
depending on the size of your data set, the number of learners you specify, and the optimization method you choose,
fitcautocan take some time to run.if you have a parallel computing toolbox license, you can speed up computations by running the optimization in parallel. to do so, specify
"hyperparameteroptimizationoptions",struct("useparallel",true). you can include additional fields in the structure to control other aspects of the optimization. seehyperparameteroptimizationoptions.if
fitcautowith bayesian optimization takes a long time to run because of the number of observations in your training set (for example, over 10,000), consider usingfitcautowith asha optimization instead. asha optimization often finds good solutions faster than bayesian optimization for data sets with many observations. to use asha optimization, specify"hyperparameteroptimizationoptions",struct("optimizer","asha"). you can include additional fields in the structure to control other aspects of the optimization. in particular, if you have a time constraint, specify themaxtimefield of thehyperparameteroptimizationoptionsstructure to limit the number of secondsfitcautoruns.
algorithms
alternative functionality
if you are unsure which models work best for your data set, you can alternatively use the classification learner app. using the app, you can perform hyperparameter tuning for different models, and choose the optimized model that performs best. although you must select a specific model before you can tune the model hyperparameters, classification learner provides greater flexibility for selecting optimizable hyperparameters and setting hyperparameter values. however, you cannot optimize in parallel, optimize
"linear"or"kernel"learners, specify observation weights, specify prior probabilities, or use asha optimization in the app. for more information, see hyperparameter optimization in classification learner app.if you know which models might suit your data, you can alternatively use the corresponding model fit functions and specify the
optimizehyperparametersname-value argument to tune hyperparameters. you can compare the results across the models to select the best classifier. for an example of this process, see moving towards automating model selection using bayesian optimization.
references
[1] li, liam, kevin jamieson, afshin rostamizadeh, ekaterina gonina, moritz hardt, benjamin recht, and ameet talwalkar. “a system for massively parallel hyperparameter tuning.” arxiv:1810.05934v5 [cs], march 16, 2020. .
extended capabilities
version history
introduced in r2020a
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