R help - Nov 2008 - Drawing a tree in R

Hi,

I've been trying to make use of the dendrogram class to plot a tree.
However, my attempts have failed so far because I'm not sure how to build up
the nested list. (where do I have to store the nodes?). The tree I want to be
drawn is like this: in the form (node, left child,right child)
(root,(n1,1,(n2,2,3)),4)

If it is not easily possible to draw a tree with the help of the dendrogram
class I'm open to any other method to draw a tree in R!!

Thanks!

-Severin

Severin Hacker wrote:
> 
> Hi,
> 
> I've been trying to make use of the dendrogram class to plot a tree.
> However, my attempts have failed so far because I'm not sure how to
build
> up the nested list. (where do I have to store the nodes?). The tree I want
> to be drawn is like this: in the form (node, left child,right child)
> (root,(n1,1,(n2,2,3)),4) 
> 
> If it is not easily possible to draw a tree with the help of the
> dendrogram class I'm open to any other method to draw a tree in R!!
> 
> Thanks!
> 
> -Severin
> 
> 
Severin,

Check out the R package ape for plotting phylogenetic trees.  

require(ape)
foo <- read.tree(text = "(root,(n1,1,(n2,2,3)),4);")
plot(foo)

HTH

Peter 
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