[igraph] dendrogram

[jujulj]

hi,

I don't get the dendrogram example at
http://cneurocvs.rmki.kfki.hu/igraph/doc/python/igraph.clustering.Dendrogram-class.html.

For example, node 3 and 4 are connected on the picture, but they are
not in the 'internal representation'

Is the example wrong or did I miss something?

regards

jul