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herpetological
2006 Jun 30
5
Way to convert data frame to matrix
I have a text file that I have imported into R. It contains 3 columns and
316940 rows. The first column is vegetation plot ID, the second species
names and the third is a cover value (numeric). I imported using the
read.table function.
My problem is this. I need to reformat the information as a matrix, with
the first column becoming the row labels and the second the column labels
and the