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Create compact regression ensemble


cens = compact(ens)


cens = compact(ens) creates a compact version of ens. You can predict regressions using cens exactly as you can using ens. However, since cens does not contain training data, you cannot perform some actions, such as cross validation.

Input Arguments


A regression ensemble created with fitrensemble.

Output Arguments


A compact regression ensemble. cens is of class CompactRegressionEnsemble.


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Compare the size of a regression ensemble for the carsmall data to the size of the compact version of the ensemble.

Load the carsmall data set and select acceleration, number of cylinders, displacement, horsepower, and vehicle weight as predictors.

load carsmall
X = [Acceleration Cylinders Displacement Horsepower Weight];

Train an ensemble of regression trees.

ens = fitrensemble(X,MPG);

Create a compact version of ens and compare ensemble sizes.

cens = compact(ens);
b = whos('ens'); 
c = whos('cens');  
[b.bytes c.bytes]  % b.bytes = size of ens and c.bytes = size of cens
ans = 1×2

      493630      461479

The compact ensemble uses less memory.