Gabor:
Actually, I meant a script GUI management of ugraph I managed to locate
on the net. 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?
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
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