[R] hierarhical cluster analysis of groups of vectors

[Anders Malmendal]

I want to do hierarchical cluster analysis to compare 10 groups of 
vectors with five vectors in each group (i.e. I want to make a dendogram 
showing the clustering of the different groups). I've looked into using 
dist and hclust, but cannot see how to compare the different groups 
instead of the individual vectors. I am thankful for any help.
Anders