read.r R code for reading a data set, converting it to a data matrix with appropriate row and column names, and computing a distance matrix

whichsite.r R code that defines the function for identifying pairs of sites. Converts an observation number in a distance object to a pair of sites.

mds.r R code for computing linear scaling (PCoA) and nMDS from a distance matrix, or using metaMDS to compute from a data matrix

env.r R code for doing various useful things with environmental data.

hyptest.r R code for hypothesis testing and other useful stuff

dunegrass.r Instructions for computing exercise on 7 Dec.