I do some genotyping within R and want to display the results using a minimum spanning tree (MST) and draw some additional data (i. e. species distribution) onto the nodes, like it was done with the picture below obtained from this paper: http://www.pnas.org/content/105/37/14130.full.
I found some packages to draw the MST but was not able to draw the pie charts. Sure, I can reinvent the wheel and use TechingDemos subplot function. But does an R package or function exists which just do this for me?
The ape package has some options to draw pie or stacked bar charts at the nodes of a dendrogram but not at the nodes of an MST (mst function).
A similar question was asked here (How to draw of minimum spanning tree of sequences?) but the answer does not provide an R package.