Squared matrix with elements of the sums of its indices

Hi. How can i write squared matrix with elements of the sums of the matrix indices?

Answer 1

[DGM]

Do you mean to generate a square matrix whose elements are the sum of its subscripts? If so:

If you're using R2016b or newer, you can do

s=5; % size of matrix
A=(1:s) + (1:s)'

otherwise, you can do this in place of line 2:

A=bsxfun(@plus,(1:s),(1:s)')

Of course, this could be extended to non-square matrices:

s=[4 5]; % size of matrix
A=(1:s(2)) + (1:s(1))'