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From: "ayman ayad" <sea_dreamer82@yahoo.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: urgent help in " calcualting number of free independent path"
Date: Wed, 7 Jan 2009 14:33:02 +0000 (UTC)
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hi all 
I wish you all first a wonderful day and hope everything is going great 
Let me introduce myself 
Aim   ayman Ramadan from Egypt 
I prepare my master in "optimal design of pipe network"
And I was seeking a help in the matter of 
"Transferring the arc-node adjacency matrix into node- arc connectivity matrix"

For example 
A closed rectangle loop of 4 nodes A, B.C.D
The arc-node adjacency matrix = [ 1 0 -1 0 ; 0 1 -1 0 ; 0 0 1 -1 ; -1 0 0 1]
I have such matrix and I want to convert it into 
[0 1 0 1; 1 0 1 0; 0 1 0 1 ; 1 0 1 0]
Can you help me with that?
I really hope that I didn&#8217;t annoy you 

Wish you again best 
Yours
Ayman Ayad
Sea_dreamer82@yahoo.com