Hi Jacob,
It is possible to call nodelabels() several times to do something
similar to what you want by playing with the adj argument which is
c(0.5, 0.5) by default (ie, the label is centered on the node). You can
try this:
tr <- rcoal(5)
plot(tr, "p", FALSE)
for (h in c(0.4, 0.5, 0.6))
for (v in c(0.4, 0.5, 0.6))
nodelabels(pch=15, col=sample(colors(), size=1), cex=2, adj=c(h, v))
The difficulty is to find the 1st and 3rd values of h (horizontal) and v
(vertical) and this will depend on the size of the device (and the value
of cex of course). Maybe there's a way to automate these calculations.
Best,
Emmanuel
Le 30/08/2018 à 00:12, Jacob Berv a écrit :
Dear R-sig-phylo,
Does there exist a function to plot heatmaps at internal nodes of a tree? For
example, to illustrate support values from different phylogenetic analyses — ie
given a set of 3x3 matricies of support values for particular nodes.
It seems like there may be a partial (and definitely workable) solution here, using
ggtree— https://rgriff23.github.io/2017/05/11/primate-phylogeny-ggtree.html
<https://rgriff23.github.io/2017/05/11/primate-phylogeny-ggtree.html>, if such
heatmaps are saved as raster images (about 1/2 way down). This may be the easiest
solution, but it would be preferable to keep everything in vector format and all in R.
I guess I could do this by calling image() for the individual heatmaps and then
just linking them up to nodes of interest in illustrator (but that feels like
cheating).
Jake
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