[R] what does Height represent?

Anupam Tyagi AnupTyagi at yahoo.com
Tue Sep 19 17:25:26 CEST 2006

zhaoshi <zhaoshi <at> u.washington.edu> writes:

> hi--
> I am new to R and try to use R cluster my binary data. I use 
> hierarchical clustering
> plot (hclust (dist(x,method="binary"),method="average"),cex=0.1)
> I end up with a cluster Dendrogram. On the left of my dendrogram, there 
> is scale called Height from 0.0 to 1.0.
> I don't understand what does Height represent. If the Height represents 
> the distance scale between two different data point,
> it looks like if I add up the length of each branch, I end up with 
> distance of some pairs > 1. It is not possible the distance
> between any data point will greater than 1. Could some help me out?

Hi zhaoshi, please check the documentation for the function using ?hclust. You
may also want to look at a book that uses R/S-plus for cluster analysis.
Venables and Ripley's "Modern Applied Statistics with S-plus" Chapter 11 may be
of some help. Anupam.

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