Genetic Algorithm New population creation

I am working with genetic algorithm toolbox. I don't to how to use it to produce new features to reduce classification loss. My fitness function is classification loss. I am getting this error

Error using classreg.learning.FullClassificationRegressionModel.prepareDataCR (line 201) X and Y do not have the same number of observations.

Error in classreg.learning.classif.FullClassificationModel.prepareData (line 487) classreg.learning.FullClassificationRegressionModel.prepareDataCR(...

Error in ClassificationKNN.prepareData (line 875)

Answer 1

[Yuvaraj Venkataswamy]

Try this.

if true
  % Data1  = load('Data2.mat','traindata');
end