Function that returns an NxN matrix

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I need to create a function that when a value for N is entered it returns an NxN identity matrix. But this needs to be done without employing Matlab commands which operate on entire matrices, rows, and columns.
  2 Comments
Andrei Bobrov
Andrei Bobrov on 8 Oct 2014
in MATLAB without employing Matlab commands - how?
Stephen23
Stephen23 on 8 Oct 2014
All functions require MATLAB commands, starting with the function function.

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Accepted Answer

Andrei Bobrov
Andrei Bobrov on 8 Oct 2014
for jj = N:-1:1
out(jj,jj) = 1;
end
  5 Comments
Stephen23
Stephen23 on 9 Oct 2014
Edited: Stephen23 on 9 Oct 2014
Andrei Bobrov: I like the array preallocation through the reversed sequence. That is a nice touch!
Andrei Bobrov
Andrei Bobrov on 10 Oct 2014
Hi Stephen! This is idea by Jan Simon.

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