[R] Howto modify a drawn graph with igraph

[Uwe Ligges]

See ?plot.igraph, example:

plot(g, layout=mlayout,
     vertex.label.color = "red",
     vertex.color = "green",
     vertex.frame.color = "blue",
     edge.color = "orange",
     edge.width = 1 + (1:18)/2
)

Uwe Ligges



On 06.06.2010 17:58, Etienne Cuvelier wrote:
> Hello,
> I am using the igraph package, and I wonder how to add or modify
> informations on a drawn graph.
>
> Example:
> library(igraph)
> M <- matrix( nc=12, nr=12 , 0)
> M[ 1,]=c(0,1,0,0,1,1,0,0,0,0,0,0)
> M[ 2,]=c(1,0,1,1,1,0,0,0,0,0,0,0)
> M[ 3,]=c(0,1,0,0,0,1,1,0,0,0,0,0)
> M[ 4,]=c(0,1,0,0,0,1,0,0,0,0,0,0)
> M[ 5,]=c(1,1,0,0,0,0,0,0,0,0,0,0)
> M[ 6,]=c(1,0,1,1,0,0,0,0,0,0,0,0)
> M[ 7,]=c(0,0,1,0,0,0,0,1,1,0,0,1)
> M[ 8,]=c(0,0,0,0,0,0,1,0,1,0,0,1)
> M[ 9,]=c(0,0,0,0,0,0,1,1,0,0,1,1)
> M[10,]=c(0,0,0,0,0,0,0,0,0,0,1,0)
> M[11,]=c(0,0,0,0,0,0,1,0,1,0,0,0)
> M[12,]=c(0,0,0,0,0,0,0,1,1,0,0,0)
> g <- graph.adjacency( M,mode="undirected" )
> mlayout= layout.kamada.kawai(g)
> plot(g,layout=mlayout)
>
> #And now howto add a weight associated on edges on the "picture"?
> #Or howto change the color of an edge, or a vertice?
>
> Thanks for help.
>
>
> Etienne
>
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