Re: [igraph] Help!!!how to get the laplacian of a huge graph with more than 10000 nodes?

[lan gao]

Thanks a lot!!!

On Thu, Oct 23, 2008 at 12:37 PM, Gábor Csárdi <address@hidden> wrote:

Do it "by hand":

L <- Diagonal(vcount(g), degree(g)) - get.adjacency(g, sparse=TRUE))

Gabor

ps. don't forget to handle loop/multiple edges if you might have any.

On Thu, Oct 23, 2008 at 7:00 PM, lan gao <address@hidden> wrote:
> I have a large graph with more than 100000 nodes.
> When I use graph.laplacian(g) , R says "can not locate a vecotor of size..."
> If I save the graph in a sparse matrix form, then is not the right graph
> object that "graph.laplacian" requires.
> What can I do?
> Anybody knows how to sovles this problem? I appreciate your help.
>
>
>
> Lani

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--
Gabor Csardi <address@hidden>     UNIL DGM


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