How to replace a matrix element

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MOHD
MOHD 2013-1-5
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!

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Image Analyst
Image Analyst 2013-1-5

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