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?

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Richiesto:

il 28 Nov 2019

Risposto:

il 28 Nov 2019

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