windex: Calculates Wheatsheaf index with 95% confidence intervals

In windex: Analysing Convergent Evolution using the Wheatsheaf Index

Calculates Wheatsheaf index with 95% confidence intervals

Description

Takes a phylo object and trait data and returns the Wheatsheaf index for the traits on the tree along with 95% confidence intervals obtained from jackkniving.

Usage

windex(dat, tree, traits, focal = dat[, 2], SE = TRUE, fossil=FALSE)

Arguments

dat	A dataframe containing a column of 0s and 1s to denote non-focal and focal taxa respectively, and columns of trait data which you which to plot. The first column must be named 'species' and contain species names that correspond to those in the phylogenetic tree.
tree	Phylogenetic tree of class 'phylo' containing branch lengths. The tree should also be ultrametric.
traits	Column numbers (or names) for the traits for which you want to calculate a Wheatsheaf index.
focal	Column in the dataframe containing the focal designations.
SE	A logical specifying whether to standardise the traits by their standard error across species, default is SE=TRUE.
fossil	A logical specifying whether tree is ultrametric (for instance to to presence of fossil tips), in which case a different phylogenetic distance penalty based on shared branch length rather than shared time before divergence will be used instead.

Value

w	Calculated Wheatsheaf index
low95	Lower bound of 95% confidence interval for the Wheatsheaf index obtained by jackkniving
up95	Upper bound of 95% confidence interval for the Wheatsheaf index obtained by jackkniving

Author(s)

Kevin Arbuckle and Amanda Minter

References

Arbuckle, K., Bennett, C.M. and Speed, M.P. 2014. A simple measure of the strength of convergent evolution. Methods in Ecology and Evolution 5:685 - 693.

See Also

test.windex windex.sim.test

Examples

data(sample.data)
data(sample.tree)
windex(sample.data,sample.tree,traits=c("ou1","ou2"),focal=sample.data[,2],
SE=TRUE)

windex documentation built on Oct. 11, 2023, 5:16 p.m.