dendrogram about a known membership
I'd like to get your suggestions about how to build a dendogram.
My problem is this: I need to build a dendrogram about the result of a cluster analysis I have already performed. I already have the membership of my elements. So it's like i know the hierarchy of my clusters but I'm unable to generate a visualization of them.
Basically I have two hiearachical levels:
at the 1st level there are 25 clusters (which in turn contain all the 370 elements of my system)
at the 2nd level there are about 8 clusters (which in turn contain the previous 25 clusters)
Do you know any software, language, trick to solve this issue?
I'm not an expert in maths but as far as I have understood googling, it looks like only software/packages that make a cluster analysis and then build the dendrogram are available.