How to replace a matrix element

Hi,

I am having a particular problem in the foll matrix:

A=[-1 1 0 0 0; 0 -1 1 0 0; 0 0 0 -1 1; -1 1 0 0 0]; I need to replace only a particular element(i.e.-1) with +1, while others remaining the same using matlab coding. I am not getting how to do this. It would be very grateful if anybody could help me in this regard..

Thanking you!

Answer 1

[Image Analyst]

Gee, sounds familiar: http://www.mathworks.com/matlabcentral/answers/57528-change-the-sign-of-a-particular-element-in-a-matrix Same course, perhaps?