diagonal

Returns a vector with the main diagonal of a matrix. Similar to the built-in function diag

This file contians a function named "diagonal01" which isolates in a row vector the diagonal of a matrix (square or not), whitout using a loop. It is similar to the Matlab built-in function "diag" when used with one input argument.
For example, the instructions
» A=magic(4); A(end,:)=[], B=diagonal01(A)

Produce

A =
16 2 3 13
5 11 10 8
9 7 6 12
B =
16 11 6