I have data frames on which I want to calculate the default Bray-Curtis
dissimilarity matrix using vegdist() in the vegan package. The data are
proportions of individuals in each of 5 categories with the first column as
the collection date. One such data frame is:
sampdate filter gather graze predate shred
1 2004-06-17 0.0093 0.8881 0.0295 0.0685 0.0046
2 2005-07-18 0.0149 0.8402 0.0951 0.0467 0.0030
3 2006-06-29 0.0217 0.7538 0.1185 0.1006 0.0055
4 2011-07-14 0.0241 0.8408 0.0645 0.0625 0.0081
5 2012-07-10 0.0114 0.4877 0.0256 0.2936 0.1818
Am I correct in assuming that I need to remove the sampdate column?
Rich
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