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## [igraph] Possible bug on R igraph

**From**: |
Wenyu Zhang |

**Subject**: |
[igraph] Possible bug on R igraph |

**Date**: |
Sun, 19 Jan 2014 03:51:35 +0000 |

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

**[igraph] Possible bug on R igraph**,
*Wenyu Zhang* **<=**