The function returns a list of two elements (phy and data) that are manipulated to include only those species
found in both the tree and data supplied by the user.
Arguments
phy
a phylogenetic tree of class 'phylo'
data
a named vector or matrix of continuous trait values, for species in phy
sort
whether to sort the data based on names found in phy
warnings
whether to report warnings of mismatched taxa between phy and data
Author
LJ Harmon
Details
This function is a general tool for checking for concordance between a data object and a phylogenetic
tree. For the data, names can be specified as the names of objects in the vector or rownames of the data
array.