On Wed, Aug 8, 2012 at 1:14 PM, jameson mcfarlane <[email protected]> wrote: > G, thank you. Here is the code: > > library(igraph) > D <- read.csv("New Jam.csv") > D <- D[,-1] > G <- graph.adjacency(as.matrix(D), weighted=TRUE)
D is not an adjacency matrix. graph.adjacency() works with adjacency matrices. You need to convert your data to an adjacency matrix, or construct the graph in a different way. Gabor > > V(G)$label <- V(G)$name > V(G)$shape <- "rectangle" > V(G)$color <- "white" > V(G)$size <- 40 > > mst <- minimum.spanning.tree(G) > lay <- layout.reingold.tilford(G, mode="all") > plot(mst, layout=lay) > > > Thanks again >> Date: Wed, 8 Aug 2012 13:07:58 -0400 >> From: [email protected] >> To: [email protected] >> Subject: Re: [igraph] Square Matrix /MST > >> >> Hi, I am not sure how you are converting your data file into an igraph >> graph, probably you are trying to call graph.adjacency, and the data >> file is clearly not an adajacency matrix. >> >> Please show us your code and we will tell you what is wrong. >> >> G. >> >> On Wed, Aug 8, 2012 at 12:58 PM, jameson mcfarlane >> <[email protected]> wrote: >> > Hello Everyone, >> > I'm rather new to igraph. I am using Windows 7 to create an MST >> > (Minimum Spanning Tree) with the attached data file. However, I keep >> > getting >> > that this data is not a square matrix. Any kind of help will be much >> > appreciated. >> > >> > Thank you, >> > Jameson >> > >> > _______________________________________________ >> > igraph-help mailing list >> > [email protected] >> > https://lists.nongnu.org/mailman/listinfo/igraph-help >> > >> >> >> >> -- >> Gabor Csardi <[email protected]> MTA KFKI RMKI >> >> _______________________________________________ >> 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 > -- Gabor Csardi <[email protected]> MTA KFKI RMKI _______________________________________________ igraph-help mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/igraph-help
