[R] plotting dendrograms from cluster analyses

[Jakub Fast]

> Hi all,
> I have a bit of a newbie question here that I hope y'all can help with.
I've
> run a cluster analysis using hclust on about 500 objects (using R1.3 under
> Win 2000). The problem is that the tips of the dendrogram are so close
> together on the plot that the labels overlap and are unreadable. I've used
> "cex" to reduce the label sizes but this isn't sufficient with so many
> objects on the plot. I've looked at "cutree" but this seems to show a
> summary of the upper levels of the dendrogram (?) and I want to see the
> details at the bottom. Basically I just want to print the dendrogram over
> several pages so that the plot is stetched out horizontally and the tip
> labels become readable. Is that possible? More generally, how does one
print
> out large plots over several pages?? Can that be done?
> Many thanks for any help,
> Duncan

I have done clusterings with ca. 300 items. For those, I found that a paper
size of 25 by 25 inches was more than enough.I don't remember, but I think I
set the cex to something like 0.5~0.7 on those. When printed out on multiple
pages the trees were perfectly readable.

Regards,

Kuba Fast



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