Re: [Rd] write.csv(..., col.names = FALSE) (PR#13202)

From: Paul Roebuck <plroebuck_at_mdanderson.org>
Date: Sun, 26 Oct 2008 23:58:33 -0500 (CDT)

On Fri, 24 Oct 2008 stefan.albrecht_at_allianz.com wrote:

> in write.csv() it is not possible to set both
> row.names = FALSE, col.names = FALSE
> since the col.names = FALSE gets overwritten:
>
> > write.csv
> function (...)
> {
> Call <- match.call(expand.dots = TRUE)
> for (argname in c("col.names", "sep", "dec", "qmethod")) if
> (!is.null(Call[[argname]]))
> warning(gettextf("attempt to set '%s' ignored", argname),
> domain = NA)
> rn <- eval.parent(Call$row.names)
> Call$col.names <- if (is.logical(rn) && !rn)
> TRUE
> else NA
> Call$sep <- ","
> Call$dec <- "."
> Call$qmethod <- "double"
> Call[[1]] <- as.name("write.table")
> eval.parent(Call)
> }
> <environment: namespace:utils>
> >
>
> This is not documented and should be changed, as it is
> an unintended reaction.

?write.csv

> write.csv and write.csv2 provide convenience wrappers
> for writing CSV files. They set sep, dec and qmethod,
> and col.names to NA if row.names=TRUE and TRUE otherwise.

Seems documented to me.

Note that write.csv is just a wrapper for write.table. If you don't like the wrapper, you could always call write.table with its arguments set just as you want.



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