Supplement 1. R source code for the statistical methods described in this paper, with a short tutorial describing their use.

File List plots.R -- R source code for making plots simpleeg.R -- R source code for the simple example described in the paper Phillips_and_Elith_online_tutorial.pdf -- A short tutorial describing how to use the R code PhillipsElith.zip -- Data for the New South Wales case study used in the tutorial, together with the above files. Description The R code in plots.R creates POC-plots, which are presence-only analogs of calibration plots. The plots are described in the original paper, and instructions for use of the R code are in Phillips_and_Elith_online_tutorial.pdf.