[R] Search for a graph package - see link

[Gábor Csárdi]

On Wed, Apr 15, 2009 at 9:35 AM, Knut Krueger <rh at krueger-family.de> wrote:
> Gábor Csárdi schrieb:
>>
>>> The would prefer two parallel arrows one for each direction.
>>>
>>
>> You can set 'curved' to a value close to zero and then the arrows will
>> be only a bit curved.
>>
>>
>
> No I am lost ... do you mean?
> ...
> E(g)$curved <- 0.5
> ...
> plot.igraph(g, layout=layout.kamada.kawai, vertex.label.font=2)
> I do not see any change ..

Because 0.5 the default value. Try 0.1. I.e.

library(igraph)
g <- graph.ring(3, dir=TRUE, mut=TRUE)
g$layout <- layout.circle

E(g)$curved <- 0.5
plot(g)

E(g)$curved <- 0.1
plot(g)

> and I do not found any curved assignment in the plot.igraph function.

It is a good idea to read the documentation as well, especially if you
don't understand the code. See ?igraph.plotting and search for
'curved'.

[...]
> http://www.equine-science.de/temp/r-graph.jpg
[...]

That possible with igraph, you need to define a new vertex shape for
it. See ?igraph.vertex.shapes and the R/plot.shapes.R file for some
simple example shapes.

Or you can write the whole thing for yourself, using 'segments', etc.

G.

> Regards Knut
>
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-- 
Gabor Csardi <Gabor.Csardi at unil.ch>     UNIL DGM