Brigid Mooney wrote:
Hello,
I am writing out to a file and have two quick questions that I can't
seem to track down the correct answers for. Luckily, I *think* they
are both simple enough that someone might be able to point me in the
right direction on them without too much trouble.
Both questions relate to the process below where CompleteFrame is a
data frame containing what I want printed to a file.
filename <- "C:\\MyDocuments\\TestOut_050609.txt"
output <-file(filename, open="wt")
write.csv(CompleteFrame, output, row.names = FALSE, col.names=FALSE)
close(output)
Question #1:
Every time I run this process, I get the warning:
Warning message:
In write.csv(CompleteFrame, output, row.names = FALSE, col.names = FALSE) :
attempt to set 'col.names' ignored
And it still prints the column names as the first row in my file,
which I do not want...
Question #2:
This process puts quotes around all data of class = character.
I can't have these quotes in my file - is it possible to get R to omit
them even if my data frame contains character strings?
Any help or hints on this are greatly appreciated!
Thanks,
Brigid
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Hi Brigid,
Re. Question 1: This is simply due to a convention about csv files. In
order to ensure conformity of the output file, write.csv() doesn't allow
users to change col.names.
Re. Question 2: The "quote" argument is what you should be modifying.
If you really want no column names, use write.table() instead (with
sep="," and a filename with a .csv extension). After all, write.csv() is
merely a wrapper for write.table().
Cheers,
--
*Luc Villandré*
/Biostatistician
McGill University Health Center -
Montreal Children's Hospital Research Institute/
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
