[R] plot a dendogram

[Olivier Martin]

Hi all,

My problem concerns cluster dendogram.
For example, i obtain :
h<-hclust(mat,method="ward").
I can plot the dendogram with:
plot.hclust(h)

This is my questions:
1- I would like to cut the tree and only display the part for which
     h$height is greater than 20 for example.

2- I would like to plot the dendogram for one class. More precisely,
suppose that i
     have two classes for my classification
     How can i plot the dendograms for my two classes.


I tried to use the tree libarary but with no success.
Could you help me.
Best regards,
Olivier


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Olivier MARTIN
PhD student                  phone: (33) 04 76 61 53 55
Projet IS2                               06 08 67 93 42
INRIA Rhone-Alpes            fax  : (33) 04 76 61 54 77
655, Av. de l'Europe
Montbonnot                   e-mail:olivier.martin at inrialpes.fr
38334 Saint Ismier cedex
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