Matlab Removing Every Other Element From A 3D Matrix

Question

I have a three dimensional matrix from which I would like to remove every other entry from an LxLxL matrix, where L will vary each time I run the code. I have searched through the internet, and I can not seem to find anything helpful. Could someone possibly lend some help.

Thank you

Answer 1

M = zeros(L, L, L);
% ...fill M...
M = M(1:2:L, 1:2:L, 1:2:L);