Re: [R] Way to convert data frame to matrix

From: Philipp Pagel <philipp.pagel.lists_at_t-online.de>
Date: Sat 01 Jul 2006 - 00:32:43 EST

On Fri, Jun 30, 2006 at 10:11:15AM -0400, Wade Wall 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.

I'm not 100% sure but I think you are looking for reshape().

cu

        Philipp

-- 
Dr. Philipp Pagel                            Tel.  +49-8161-71 2131
Dept. of Genome Oriented Bioinformatics      Fax.  +49-8161-71 2186
Technical University of Munich
Science Center Weihenstephan
85350 Freising, Germany

 and

Institute for Bioinformatics / MIPS          Tel.  +49-89-3187 3675
GSF - National Research Center               Fax.  +49-89-3187 3585
      for Environment and Health
Ingolstädter Landstrasse 1
85764 Neuherberg, Germany
http://mips.gsf.de/staff/pagel

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Received on Sat Jul 01 00:44:24 2006

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