search for: herpetologica

Displaying 1 result from an estimated 1 matches for "herpetologica".

Did you mean: 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