
Hello,

It appears you are using the igraph package.  You can get rid of the arrows using a few different methods.

You can make the graph undirected:

new.graph <- as.undirected(old.graph)

plot(new.graph)

Or you can simply specify the size of the arrows as zero using either

E(some.graph)$arrow.size <- 0

plot(some.graph)

OR

plot(some.graph, edge.arrow.size=0)

There are many great plotting features with the igraph package available here:

http://igraph.sourceforge.net/doc/R/plot.common.html

Best,
Gary


On Apr 12, 2011, at 6:00 AM, r-help-request@r-project.org wrote:

> Message: 77
> Date: Mon, 11 Apr 2011 15:09:26 -0700 (PDT)
> From: kparamas <kparamas@asu.edu>
> To: r-help@r-project.org
> Subject: [R] plot - kamada.kawai layout without arrows
> Message-ID: <1302559766984-3443258.post@n4.nabble.com>
> Content-Type: text/plain; charset=us-ascii
> 
> Hi,
> 
> I am plotting a graph with kamada.kawai layout. 
> 
> But I am getting direction arrows in the graphs.
> Please let me know how to avoid this.
> 
> g <- watts.strogatz.game(1, 2000, 5, 0.4)
> 
> comps <- clusters(g)$membership
> colbar <- rainbow(max(comps)+1)
> V(g)$color <- colbar[comps+1]
> 
> png(filename)
> plot(g, layout=layout.kamada.kawai, vertex.size=2, vertex.label=NA)
> dev.off()
> 
> Please find attached the figure with arrows..
> http://r.789695.n4.nabble.com/file/n3443258/cdata1_plot.png 

--
Gary Weissman
http://www.babelgraph.org/
gary@babelgraph.org




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