Hi Sk, On Wed, Mar 2, 2011 at 8:43 AM, SK MAIDUL HAQUE <skmaidulha...@gmail.com> wrote: > 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 cover values as the matrix cell data.
dat.m <- as.matrix(dat) rownames(dat.m) <- dat[, 1] dat.m <- dat.m[, -1] However, since the > read.tablefunction imported the data as an indexed data frame, I can't use > the columns > as vectors. I'm not sure why you can't access the collumns in a data.frame. Of course you can -- see ?"[" or ?subset Is there a way around this, to convert the data frame as 3 > separate vectors? ?"[" Best, Ista I have been looking all over for a function, and my > programming skills are not great. > > > -- > Sk Maidul Haque > Scientific Officer-C > Applied Spectroscopy Division > Bhabha Atomic Research Centre, Vizag > > Mo: 09666429050/09093458503 > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Ista Zahn Graduate student University of Rochester Department of Clinical and Social Psychology http://yourpsyche.org ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
