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[igraph] problems with edges

From: Figa Pelosa
Subject: [igraph] problems with edges
Date: Thu, 16 Jul 2009 18:48:11 +0000 (GMT)

Hallo everybody, I hope you could help me with my problem.
I'm working with python and I'm exploring igraph for the 1st time..
I do not really understand how to address the edges.

Here's what I do:
1) I read a adjacency matrix from a text file with:
g = load('./myGraph.txt')

where the text file looks like this:
0 1 2 3
1 0 4 5
2 4 0 6
3 5 6 0

2) I now want to check the weight of the edge connecting vertex number 0 to vertex number 1, which should be 1.. so I write:

but it returns 0.

Why is it so?
I hope you can help me
Thanks a lot

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