[Rd] write.csv ignores 'row.names'
rpeng at jhsph.edu
Thu Nov 24 17:36:48 CET 2005
Okay, upon further examination, it appears that it works fine if you set
'row.names = FALSE' as opposed to 'row.names = F'.
Roger Peng wrote:
> Upon replying to this email, I took a look at 'write.csv()' and noticed
> something interesting. I remember there being a discussion sometime in
> the past about letting 'write.csv()' accept the 'row.names' argument.
> However, I get the following error:
> > write.csv(airquality, file = "myfile.csv", row.names = F)
> Error in write.table(airquality, file = "myfile.csv", row.names = F,
> col.names = NA, :
> col.names = NA makes no sense when row.names = FALSE
> In 'write.csv()' there is
> rn <- Call$row.names
> Call$col.names <- if (is.logical(rn) && !rn)
> but is.logical(rn) is always FALSE because even if 'row.names' is
> specified (non-NULL), it is of class "name". Perhaps something like
> rn <- eval(Call$row.names)
> would suffice? I can't tell if that would break anything.
> Sven Schaltenbrand wrote:
>> i have a problem by writing a csv file
>> the first colum is filled with index numbers from 1 to n.
>> i have to unique two csv files once a week while one file is always the
>> can anybody tell me, how to write the dataset into a csv file without the
>> first row of the indexnumbers.
>> x[,-1] does not wok as it eliminates the first "interesting" colum.
>> col.names is not accepted by r (do i habe to start a package first? which
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