In MATLAB while using Neural fitting toolbox (nftool) for solving input-output mapping problem we have to divide samples for “Training, Validation and Testing”. For developing the network we need to train the samples. But if we retrain the samples nftool takes new samples every time. Is there any way by which we can fix the samples for “Training, Validation and Testing”? I don’t want to change my samples every time I run my nftool code.