Dear R-Sig-Phylo, I was wondering if there was any way to color-code a lineage-through-time plot, to highlight the proportion of taxa at specific intervals that belong to a particular clade. I.e., an LTT plot of tetrapod diversity through time, and I want to highlight the number of lineages at any one point in time that are chondrichthyans, sarcopterygians, lissamphibians, etc. (see attached fig. as an example). I figured I can do this by asking R to return all lineages that are descendants of a specific node, but am not sure what functions I can use to convert the dated tree into an object that can be read into ggplot.
Sincerely, Russell
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