I tried again. It works!!! Thank you so very much.
On Thu, Sep 4, 2008 at 9:56 AM, Tamas Nepusz
<address@hidden> wrote:
Thank you so much. I see the problem...my file is a txt file.
The extension doesn't matter, igraph is happy with whatever extension you use as long as you specify the format as a keyword argument (see my example).
The NCOL format is a plain simple format, every line consists of two or three items:
vertexname1 vertexname2
or
vertexname1 vertexname2 weight
Your input file is exactly in that format, that's why I think that the NCOL reader should work out of the box.