Hi Gabor, Thank you very much for your prompt answer.
What can I do in case I need to get the first vertex of a specific edge, depending on a label that I set for that edge? For example I have a graph g whose edges have a label, "label" and I want to select the first vertex of all these edges. For selecting the edge I can use the following: edges = E(g)[which(E(g)$label == value)] But afterwords? How can I get the first vertex too? Thank you again. Best Regards. Matt On Mon, Jun 29, 2015 at 7:49 PM, Gábor Csárdi <[email protected]> wrote: > Hi Matt. In the new version it is called ends(). G. > > library(igraph) > g <- make_ring(10) > > ends(g, 1) > #> [,1] [,2] > #> [1,] 1 2 > > ends(g, 3) > #> [,1] [,2] > #> [1,] 3 4 > > > > On Mon, Jun 29, 2015 at 7:30 PM, Matt <[email protected]> wrote: >> >> Dear All, >> >> If I have an edges, is there a way to get its vertices? >> >> Thank you very much. >> >> Best regards. >> >> Matt >> >> _______________________________________________ >> igraph-help mailing list >> [email protected] >> https://lists.nongnu.org/mailman/listinfo/igraph-help > > > > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help > _______________________________________________ igraph-help mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/igraph-help
