Is there any way to change the orientation of the labels on the end of the dendrograms to horizontal rather than vertical?  If so, how can I do that.  Below is my code, but I'm not sure which argument(s) I can use to change the label(s) (if it is possible to do).

a <- hclust(z, method = "complete")

# Plots hclust dendrogram #
plot(a, frame.plot=TRUE, lwd=2)

Many thanks,

_____________________________________________
Patrick Richardson
Biostatistician - Program of Translational Medicine
Van Andel Research Institute - Webb Lab
333 Bostwick Avenue NE
Grand Rapids, MI  49503
ph. 616.234.5787


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