MATLAB: Randomly select elements of an array

Question

Hi How i can select randomly elements from a matrix o array

I have the matrix and i want to select "x" numbers of elements

thanks

Answer 1

msize = numel(YourMatrix);
idx = randperm(msize);
YourMatrix(idx(1:x))

If you have a fairly new version of MATLAB, you can instead use

msize = numel(YourMatrix);
YourMatrix(randperm(msize, x))