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[igraph] subgraph gives duplicate edges

From: Gang Su
Subject: [igraph] subgraph gives duplicate edges
Date: Mon, 31 Mar 2008 13:55:59 -0400
User-agent: Internet Messaging Program (IMP) H3 (4.0.5)

To graph fans,

I just tried igraph and it's such an awesome lib! After playing around for a while, i loaded some interaction network data with 2k vertices and 10k edges. However, when subgraphing this graph, i found it's giving me duplicate edges. I made sure that in the original dataset there's no duplicate edges at all.
So I wonder what's going on. Have anyone of you ran into similar problem?
Forexample: i subgraphed ~ 40 nodes with 377 edges, only 350 are unique. And checked the original graph is not directed.

Gang Su

PhD student
Bioinformatics training track
Program in Biomedical Sciences
University of Michigan, Ann Arbor
MI, 48105, U.S.A.

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