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>i</i> will select state <i>j</i> from <i>k</i> 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>i</i> as a probability function of the trait value. Both estimations are accomplished using data on species (relative) abundance at sites (<b>S</b>), species possession of trait states (<b>W</b>), and the expected availability of species to sites, assuming no trait-based selection (<b>A</b>). 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.