[igraph] Extra vertex being read from edgelist

[Prithwiraj MUKHERJEE]

Hi

I have attached an edgelist file "email_edges.txt". The graph has 1133 vertices. I am reading it as

G<-read.graph("email_edges.txt", format="edgelist")

On checking the graph, it has 1134 vertices (one extra vertex). Is there something I am missing?

I am using igraph's latest version (i updated it today) on R 2.15.3 (64 bit) for Windows 7.

Regards

Prithwiraj

email_edges.txt
Description: Text document