
From:  Gábor Csárdi 
Subject:  Re: [igraph] edges "disapear", when creating graph in R 
Date:  Fri, 12 Jul 2013 09:14:22 0400 
Hello,I have encountered following problem in R:I construct graph from a matrix of edges, but resulting graph has fewer edges than there is rows in the matrix.# edges are stored in a matrix M> head(M)USEK1 USEK2 [1,] 985 866 [2,] 982 866 [3,] 1062 1039 [4,] 1088 1119 [5,] 1061 1088 [6,] 1060 1061# matrix stores 3244 edges> dim(M)[1] 3244 2# number of vertices> max(M)+1[1] 2404> g < graph.empty(n=max(M)+1,directed=T)> g < add.edges(g,M)
> gIGRAPH D 2404 3242 #########there are two edges missing.Can anyone explain, what it the source of this behavior, and how can I fix it?
Best Regards,
Zbynek Janoska
Transport Research CentreOlomouc, Czech Republic
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