Yes Rui that will work for my needs thank you
-----Original Message-----
From: Rui Barradas <ruipbarra...@sapo.pt>
Sent: Wednesday, October 26, 2022 4:40 PM
To: reichm...@sbcglobal.net; R-help@r-project.org
Subject: Re: [R] Color Nodes
Às 21:37 de 26/10/2022, Jeff Reichman escreveu:
> R-Help
>
>
>
> For those of you who use igraph is there a way to highlight (color)
> particular notes. For example if I want to color the "Peter" node red
> and everything else blue or leave default) how would I do that or can
> I do that. Seems as though I might create an attribute column - maybe??
>
>
>
> Jeff
>
>
>
> library(igraph)
>
>
>
> # define links in data
>
> edges <- rbind(c("Dave", "Jenny"), c("Peter", "Jenny"), c("John",
> "Jenny"), c("Dave", "Peter"), c("Dave", "John"), c("Peter", "Sam"),
> c("Sam", "Albert"), c("Peter", "John"))
>
>
>
> # generate and plot graph
>
> # set argument directed = FALSE in graph.edgelist() to plot an
> undirected graph.
>
> g <- graph.edgelist(edges, directed = FALSE)
>
> plot(g, vertex.size = 1, vertex.label.dist = 0.5)
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
Hello,
After creating the graph, set the vertices colors by subsetting V(g).
Here are two exaples, the first color Peter red and leave the others with their
default color. The second, color the other vertices blue.
V(g)["Peter"]$color <- "red"
plot(g, vertex.size = 20, vertex.label.dist = 0.5,
vertex.color = V(g)$color)
V(g)$color <- "blue"
V(g)["Peter"]$color <- "red"
plot(g, vertex.size = 20, vertex.label.dist = 0.5,
vertex.color = V(g)$color)
Hope this helps,
Rui Barradas
______________________________________________
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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