[Bioperl-l] Draw phylogenetic trees with bar chart

[Florent Angly]

Dear Bioperl users,

I need to represent graphically phylogenetic trees as cladograms or 
phylograms using Perl. An additional requirement is that I would like to 
add graph data as bar chart on top of it as in this example:
    http://scums.sdsu.edu/Mapper/images/b.gif

Now, I have read the BioPerl howto and know about the 
Bio::TreeIO::svggraph and Bio::Tree::Draw::Cladogram modules. The first 
one uses the SVG Perl module whereas the other one uses the PostScript 
module to create EPS images. I do not know why there are 2 very similar 
modules to draw trees (in different locations), but none of them seem to 
able to plot additional information on the tree.

Is there any other Perl code that you know of that would facilitate 
doing what I want to do? If not, how should I modify one of the 2 
mentioned BioPerl modules to plot bar charts, and which one??

Thanks,

Florent