On Thu, Aug 1, 2013 at 11:26 PM, 四正（红砖） <[email protected]> wrote:
> > for an edgelist file, we can use read.graph(in R) to load the graph, it > seems fast, and the node id in edgelist file will be used as real node id. > > however, if i add the vertices by reading the edgelist file myself, the > node ids in the file will be only used as the names of the vertices. > It would be nice to have some complete example (=code), to see what exactly you did. read.graph() can read various formats, and sometimes vertex names are created, sometimes not. I guess you used format="edgelist", so no vertex names were added. if i add the two types of vertices in advance, how can i add the edges > between them according to the edgelist file? it seems that add.edges can > only add edges by names of the node? > You can add edges based on numeric vertex ids as well. The type of the vertex has not much to do with the name of the vertex, so I still don't get the problem. Gabor [...]
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