[R] dendrogram / clusteranalysis plotting

[Gavin Simpson]

On Fri, 2007-03-09 at 01:01 +0100, bunny , lautloscrew.com wrote:
> Dear all,
> 
> i performed a clusteranalysis - which worked so far...
> i plotted the dendrogram and sooo many branches, a rough sketch would  
> be enough ;)
> 
> i tried max.levels therefore which worked, but not for the plot...

(re-)read ?dendrogram. function cut.dendrogram() can prune a tree's
lower branches. You can plot the returned object's $upper component,
which is itself an object of class "dendrogram".

There is an example in ?dendrogram of using cut.

HTH

G

> 
> i used the following
> 
> plot(hcd,nodePar =nP, str(hcd,max.level=1))
> 
> the output on the terminal was:
> 
> --[dendrogram w/ 2 branches and 196 members at h = 2.70]
>    |--[dendrogram w/ 2 branches and 34 members at h = 1.79] ..
>    `--[dendrogram w/ 2 branches and 162 members at h = 1.95] ..
> 
> which is great !
> 
> but i cant get it done for the plot, the plot always shows all the  
> branches...!
> does anybody know how to fix this one ?
> 
> thx in advance
> 
> -m.
> 
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Gavin Simpson                     [t] +44 (0)20 7679 0522
ECRC                              [f] +44 (0)20 7679 0565
UCL Department of Geography
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