how to divide data set randomly into training,t​esting,val​idation data set?

Hello guys, I have a dataset of a matrix of size 116*116*45 type double and I want to divide it randomly into 3 subsets training,testing and cross-validation sets.

how to make it randomly generated everytime it run?

can anyone help me?

Answer 1

[Image Analyst]

Try randsample() or randperm().