Never mind, I figured this out.
Thanks Peter Peter Flom Peter Flom Consulting <http://www.statisticalanalysisconsulting.com/> http://www.statisticalanalysisconsulting.com/ <http://www.IAmLearningDisabled.com> http://www.IAmLearningDisabled.com From: igraph-help-bounces+peterflomconsulting=mindspring....@nongnu.org [mailto:igraph-help-bounces+peterflomconsulting=mindspring....@nongnu.org] On Behalf Of Peter Flom Sent: Saturday, April 07, 2012 2:32 PM To: 'Help for igraph users' Subject: [igraph] Getting a subgraph of a graph whose nodes have certain attributes Hello again I am trying to get a subgraph of a graph where the nodes have certain attributes. I tried vs <- traits$Position[traits$Volume > 50] g50 <- subgraph(g, vs) But vs contains many NA's and the run of g50 gives the following Traceback: 1: .Call("R_igraph_subgraph", graph, as.igraph.vs(graph, v), PACKAGE = "igraph") 2: subgraph(g, vs) Error in subgraph(g, vs) : caught access violation - continue with care This seems simple, but I can't see what I am doing wrong. Thanks in advance Peter
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