[R] How to retrieve pairwise distances between clusters after cutting the tree?

Dear all, what would be the best way of retrieving distances between individual clusters after cutting my tree of interest? $height from the hclust object will give me the distance between clusters at a each agglomeration step, but let's say I have a situation where I have six observations A, B

[R] Installing the Matrix package

Hi all, is the Matrix package no longer available for download via install.packages? When I try to install it (from any mirror), I get the following error message: install.packages("Matrix",lib="/home/kn52/R-2.5.0/library") Warning message: package 'Matrix' is not available in install.packages("