[R] Minimum Spanning Tree

[Gábor Csárdi]

On Tue, Apr 7, 2009 at 11:06 PM, jpearl01 <joshearl1 at hotmail.com> wrote:
>
> There was an error in the file... an extraneous comma.  That's taken care of.
> however, my tree prints out an image that doesn't seem like a mst.  Attached
> is the csv file I used...

Well, it looks definitely a tree to me.

> http://www.nabble.com/file/p22938299/sp_matrix.csv sp_matrix.csv
>
> I'd like it to look something like the image file also attached...
> http://www.nabble.com/file/p22938299/2006-08-27_MST.png 2006-08-27_MST.png
>
> Is there a different layout that would accomplish that?  Or if not that
> exactly, one that would help make the results a little clearer?

I am not sure what you mean. Of course you can plot it using different
layouts, e.g. with layout.reingold.tilford (after choosing the root
vertex in some way) and then it looks like a usual tree plot, but why
would that be any better?

Unless there is some external information about the graph (e.g.
spatial positions of the nodes, or a distinguished root vertex), the
layout on the image is just as good as the others.

Gabor

> Thanks for all the help!
> ~josh
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-- 
Gabor Csardi <Gabor.Csardi at unil.ch>     UNIL DGM