dtt {geiger}R Documentation

Disparity-through-time

Description

Creates a disparity-through-time plot for either a single data set or multiple data sets (for example, from simulations)

Usage

dtt(phy, data, disp = "avg.sq")

Arguments

phy Phylogenetic tree in 'phylo' format
data Data - either actual or simulated
disp Disparity metric - see disp.calc

Details

Value

Average disparity for clades whose stem crosses each time interval in the tree

Note

Author(s)

Luke J. Harmon

References

Harmon et al. 2003

See Also

Examples


data(geospiza)
attach(geospiza)

drop.tip(geospiza.tree, "olivacea")->g.tree

disp.data<-dtt(g.tree, geospiza.data)
ltt<-sort(branching.times(g.tree), decr=TRUE)
ltt<-c(0, (max(ltt)-ltt)/max(ltt));
plot(ltt, disp.data, type="l", lwd=2)


[Package geiger version 0.2-6 Index]