This is not how graph.bipartite() works. See the example and especially the
graph it creates, at the bottom of
http://igraph.org/r/doc/graph.bipartite.html.

Gabor


On Wed, Mar 5, 2014 at 8:26 AM, [email protected] <[email protected]>wrote:

>  Hi
>
> I am using graph.bipartite to generate a bipartite graph.
> Here is the source code and the error information:
>
> > v<-0:7
>  > e<-c(0,4,1,6,3,7,2,6,1,5)
> > g<-graph.bipartite(v,e)
> error in graph.bipartite(v, e) :
>   At bipartite.c:497 : Invalid (negative) vertex id, Invalid vertex id
>
> Where am I making mistakes?
>
> Moreover, I want to convert a directed graph into a bipartite graph by
> splitting each vertice into two vertices. Is there any function can do this?
>
> Thanks
>
> best
> Xueming
>
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