[R] append with write.table()
uleopold at science.uva.nl
Mon Apr 29 13:59:03 CEST 2002
>>I get the following message while trying to append an object to a file.
> You are writing a data frame to a file. You have asked that the column
> names be written out. That makes little sense in the middle of the file,
> so you get a warning. Appending is (more-or-less) only useful to add rows
> to an existing data frame on a file.
>>In addition it is not appended. Do you know why?
> No, but then you haven't given us anything much to go on.
> Here's a working example:
>>write.table(hills[1:20,], "hills.dat", quote=FALSE, sep="\t")
>>write.table(hills[22:25,], "hills.dat", quote=FALSE, sep="\t",
> append=TRUE, col.names=FALSE)
>>write.table(PoxAv, "/home/uleopold/lsk_PoxAv", append=TRUE ,
>>appending column names to file in: write.table(PoxAv,
>>"/home/uleopold/lsk_PoxAv", append = TRUE,
>>Ulrich Leopold MSc.
Thanks Brian for pointing out.I think was wrong in what I wanted to do.
I wanted to append columns not rows. I thought it is possible with that command.
Is there a command which is similar to that but adding columns to a file or an object?
Ulrich Leopold MSc.
Department of Physical Geography
Institute for Biodiversity and Ecosystem Dynamics
Faculty of Science
University of Amsterdam
Nieuwe Achtergracht 166
Phone: +31-(0)20-525-7456 (7451 Secretary)
Email: uleopold at science.uva.nl
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