distance.r Code for reading a text file, computing distance and pairwise plots, discussed on 4 Sept 2019

parkgrass1.r PMD code for comparing distances in parkgrass data

parkmds.r Code for doing nMDS, and plotting the results. Discussed on 11 Sept 2019

rowcol.r Find the row and column given location in the dist object

parkmds2.r Code for various "after the nMDS" activities and plots. Discussed on 18 Sept 2019

ordiarrow.r Code for adding time arrows to mds plots. Need to source("ordiarrow.r") before using the function.

findzeros.r A function that identifies pairs of sites with 0 distance.

parkrda.r Using environmental variables to define axes: distance-based RDA. Also code for other ordination methods (PCA, CA, RDA, CCA)

fishrda.r Using categorical environmental variables to define axes: distance-based RDA.

pcnm.r PCNM (Principal Coordinates of Neighbor Matrices) examples

tests.r Tests of various hypotheses about species composition and ordinations

mvabund.r Use of mvabund library for tests

clust.r Hierarchical clustering of species composition