Supplement 1. R source code for functions and examples of selection ratio analysis on community aggregated traits (SRCAT).

File List srcat.R -- R source code to run SRCAT analyses srcat_examples.R -- R source code to run SRCAT examples Description The function srcat() calculates the probability that a site i will select state j from k alternative versions of a discrete trait. If a continuous trait is supplied, a discrete approximation is used to estimate the selective filter imposed by i as a probability function of the trait value. Both estimations are accomplished using data on species (relative) abundance at sites (S), species possession of trait states (W), and the expected availability of species to sites, assuming no trait-based selection (A). Function parameters are described in comments within the script. The script file srcat_examples.R runs several examples of SRCAT analysis using both discrete and continuous traits.