[BioC] plclust

[Auer Michael]

This is actually a question regarding R but I think some of you might have
encounterd that problem?
How can I change the font of the labels in a plclust statement? For
example I want to label my data with numbers, but with 56 numbers they are
already overlapping and thus you can not easily distinguish them?
Is there a possiblity to set parameters, which avoid this problem?
Thanks

plclust(sample.clusters,labels=1:56,main="Hierarch. Cl. Gene")