Dear Mr/Mrs,
I am writing to report a possible bug for igraph in R platform. It seems
that igraph cannot well define undirected graph, that means it can not remove
the redundant links in the network. For example, I try to create a undirected
graph with the following text:
> Test.txt
A B
B A
A B
My R command codes are:
> library(igraph)
> Data<-read.table("Test.txt")
> Data<-as.matrix(Data)
> g<-graph.edgelist(Data,directed=F)
> degree(g)
The result is as following:
A B
3 3
It seems weird. It uses A - B edge for three times in the creation of this
undirected graph.
I am not sure whether this is due to my wrong command line or not.
Look forward to your reply.
Best wishes
Wenyu Zhang
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