Jonathan, please stay on the list.
The first query i don't understand, can you send a pdf or explain a bit what exactly happens. As for the names, use them as row or column names in the matrix (see ?colnames), and then do V(g)$label <- V(g)$name before the plotting. G. On Fri, Jul 11, 2008 at 02:47:55PM +0100, Dry, Jonathan R wrote: > Superb - thanks Gabor > > Two minor queries - firstly the network plot does not seem to fit in the > window and so only part of it is plotted. Secondly, the first row and column > of my matrix comprise the sample names - is it possible to show the names in > the nodes of the graph (currently it just shows the row number)? > > Your help is much appreciated > > Kind regards > > Jonathan > > -----Original Message----- > From: Gabor Csardi [mailto:[EMAIL PROTECTED] > Sent: 11 July 2008 14:33 > To: Dry, Jonathan R > Cc: r-help@r-project.org > Subject: Re: [R] network > > > I'm sure this is possible with 'network', but i'm not very familiar > with that package. In case you don't get an answer on how > to do it with network, here is how to do it with the 'igraph' package: > > library(igraph) > M <- matrix(runif(100)*2-1, 10, 10) > M[ lower.tri(M, diag=TRUE) ] <- 0 > > M[ abs(M) < 0.5] <- 0 > > g <- graph.adjacency(M, weighted=TRUE, mode="upper") > E(g)$color <- "green" > E(g)[ weight<0 ]$color <- "red" > > g$layout <- layout.fruchterman.reingold > plot(g) > > Please tell me if something is not clear, > Gabor > > On Fri, Jul 11, 2008 at 02:04:54PM +0100, Dry, Jonathan R wrote: > > Hello > > > > I am a relatively new user of R and am struggling to use the 'network' > > package. I have a correlation matrix (produced using 'cor'), and want to > > draw a network where each item showing correlation above a threshold (say > > 0.5) is joined by a green line, and each item showing correlation below a > > threshold (say -0.5) is joined by a red line. Does anyone have any hints > > of how to correctly use functions within the 'network' package to achieve > > this? > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > -- > Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM -- Csardi Gabor <[EMAIL PROTECTED]> UNIL DGM ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
