How to randomly select information from an existing matrix

Hello,

I currently have a matrixA, which is a matrix of [20000 x 200] with each cell in this matrix containing a corresponding value.

I need to randomly select parts of the matrix in a way that it will generate smaller matrix which is [150 x 200] in size containing information randomly sourced from the values in the original matrix.

Any tips or advice on how I can run the code? Thank you.

Answer 1

[Andrei Bobrov]

out = A(randperm(20000,150),:); % One way

[ER]

thank you very much!