Hi, to be honest I have no idea what you want. Can you give a small example? E.g. what is the expected output of your example graph?
Gabor On Tue, Feb 4, 2014 at 1:51 PM, Hermann Norpois <[email protected]> wrote: > Hello, > > I have an igraph object g and I want to subset g by using vertex ids, for > instance by > > zu > [1] "16052618" "rs3013006". > > I want to keep all edges of each defined vertix, also the edges my > vertices share with other vertices. So induced.subgraph is not an option, > isn't it? > > I tried subgraph.edges but I guess my approach is very clumsy. So I ask > for an amelioration. > > I tried: > > idx <- unique (as.vector (g[zu, edges=TRUE])) # get edges ids for vertices > of interest > idx <- idx[-1] # remove 0 > ggzu <- subgraph.edges (g, idx) > > Do you have any suggestions? > Thanks > Hermann > > > > dput (g) > structure(list(9, FALSE, c(6, 2, 7, 8, 7, 5), c(0, 1, 1, 1, 2, > 3), c(1, 5, 0, 2, 4, 3), c(0, 1, 2, 3, 4, 5), c(0, 0, 0, 1, 1, > 1, 2, 3, 5, 6), c(0, 1, 4, 5, 6, 6, 6, 6, 6, 6), list(c(1, 0, > 1), structure(list(), .Names = character(0)), structure(list( > name = c("16052361", "16052513", "16052618", "16052962", > "rs11703994", "rs62224614", "rs78724352", "rs3013006", "rs55926024" > ), x = c(16052361L, 16052513L, 16052618L, 16052962L, 16053791L, > 16053862L, 16053863L, 16054667L, 16054740L), y = c(2.156147, > 2.547104, 1.587586, 4.037532, 3.734964, 5.026869, 2.514876, > 1.543943, 0.579408)), .Names = c("name", "x", "y")), structure(list( > weight = c(0.526203, 0.725426, 0.681783, 0.579408, 0.86216, > 0.718093), color = c("grey", "blue", "grey", "grey", "red", > "blue")), .Names = c("weight", "color")))), class = "igraph") > > dput (zu) > c("16052618", "rs3013006") > > _______________________________________________ > igraph-help mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/igraph-help > >
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