Tom, On Fri, Nov 14, 2008 at 4:35 PM, Tom Backer Johnsen <[EMAIL PROTECTED]> wrote: > Gabor: > > Actually, I meant a script GUI management of ugraph I managed to locate on > the net.
Oh, ok, it will be part of igraph from the next version. But its capabilities are very limited. We are considering writing a full-fledged GUI to igraph, but I haven't found the right tools for it yet, so this will happen only next year I think. > Disregarding that, thank you for the suggestions. igraph is > definitly a non-trivial affair, with a lot of options and corresponding > flexibility. I made some changes to what you wrote: > > A <- matrix(sample(c(-1, 0, 0, 0, 1), 25, replace=T), 5) > g <- graph.adjacency(A, mode="directed", weighted=T, diag=F) > E(g)$lty <- ifelse(E(g)$weight > 0, 1, 2) > tkplot (g, layout=layout.kamada.kawai) > > This gives me something that is very close to what I want, apart from a > suspicion that if the relations between two vertices is non-symmetric, only > one of the is shown. Is it possible to have a pair of, say slightly curved > arrows as edges between them in that case? Not in the 0.5.1 version, but with the coming 0.6 version this is possible. You can download a preliminary package from here: http://cneurocvs.rmki.kfki.hu/igraph/download/igraph_0.6.tar.gz or if you're using windows, then I can build a windows binary package for you. Let me know if you need one. To make the edges curved, all you need is adding 'edge.curved=TRUE' to the arguments of plot or tkplot. To make them less curved, specify a number smaller than 0.5, the bigger the number the more curved they will be. Best, Gabor > Tom > > Gábor Csárdi wrote: >> >> Tom, you mean 'tkplot' in the igraph package? Look at ?igraph.plotting >> on how to set up plotting parameters, e.g. if you want different line >> types for the positive/negative relations, then you can make use of >> the 'lty' parameter: >> >> A <- matrix(sample(c(-1,0,1), 100, replace=TRUE), 10) >> g <- graph.adjacency(A, mode="upper", weighted=TRUE, diag=FALSE) >> E(g)$lty <- ifelse(E(g)$weight > 0, 1, 2) >> tkplot(g, layout=layout.kamada.kawai) >> >> Gabor >> >> On Fri, Nov 14, 2008 at 12:40 PM, Tom Backer Johnsen >> <[EMAIL PROTECTED]> wrote: >>> >>> I have a number of (directed) graphs based on social groups, where the >>> members have expresed likes and dislikes in respect to the other members. >>> tkgraph makes it simple to draw the graphs in a very pleasing way, but I >>> would like to differentiate between positive and negative relations in >>> the >>> graph by having the edges for the negative relations dashed and the >>> positive >>> ones continuous. >>> >>> Is that possible? If so how? >>> >>> Tom >>> >>> ______________________________________________ >>> 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. >>> >> >> >> > > > -- > +----------------------------------------------------------------+ > | Tom Backer Johnsen, Psychometrics Unit, Faculty of Psychology | > | University of Bergen, Christies gt. 12, N-5015 Bergen, NORWAY | > | Tel : +47-5558-9185 Fax : +47-5558-9879 | > | Email : [EMAIL PROTECTED] URL : http://www.galton.uib.no/ | > +----------------------------------------------------------------+ > -- Gabor Csardi <[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.
