[igraph] Gabor, could help me out of this

[lan gao]

Gabor,

        Sorry to bother you. I have trouble with the following...

         I read a graph data into R from a text file. The graph is a weighted graph with more than 6000 nodes. This is the summary of the graph:

 

summary(g)
Vertices: 6905
Edges: 7965
Directed: FALSE
No graph attributes.
Vertex attributes: name.
Edge attributes: weight.

 

Then I need to get the adjacency matrix of the graph. and I use A<-get.adjacency(g, sparse=TRUE, attr="weight")  ( I need to store this huge matrix as sparse matrix otherwise it will cause a memroy problem).

Then it comes the error "Error in pmin(el[, 1], el[, 2]) + 1 : non-numeric argument to binary operator ".

 

I can successful use A<-get.adjacency(g0, sparse=TRUE) before to test a huge random graph g0 generated by "barabarsi.game". . But the same command does not work for

the read in weighted graph.

 

I could not figure out the problem, could you please help me out?

 

Thanks tons!

 

lani