Re: [igraph] Less vertices in output than input

[Gábor Csárdi]

You need to send us a complete example that reproduces a problem. Most probably you have isolate vertices, and from an edge list file format it is sometimes not possible to know how many isolates you have. Use another file format, like Pajek, that is almost the same as an edge list, but specified the number of vertices explicitly.

Gabor

On Fri, May 3, 2013 at 9:12 AM, Laurens Rietveld <address@hidden> wrote:

I'm running igraph to do some experiments, and for some graphs I notice the number of vertices in the analysis output table (e.g. the output of evcent (graph, directed = FALSE)) is less than the vertices used as input (edge list). 

Because this only happens for some typical graphs (quite disconnected), I'm assuming this occurs because there is no weight assigned to this vertice (i.e. value zero). Is this true? Or is something else going wrong here?

Many thanks,

Laurens

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Gabor Csardi <address@hidden>     MTA KFKI RMKI