Could somebody explain why?

[John P]

Thank you toshk, Arno K,

I am trying to write some kind of "work horse" program that works on matrices. I want to have the prgm. to work in such a way that it takes as arguments a matrix (nxn or nxm) and a program or function that do something to rows or elements of the matrix. I did not think about the transcendental functions such as sin when using nxn matrix. The program works OK on nxm matrices with transcendental functions even on single elements of a matrix ex. sin(nxm matrix), but with square matrices is a different story. I made my program to work on rows or columns of the matrix and that takes care of the square matreces as well.

Thank you for the explanations.

Cheers John P