Yes, this behavior is new in 2.11.x. From the NEWS file:
o write.csv[2] no longer allow 'append' to be changed: as ever,
direct calls to write.table() give more flexibility as well as
more room for error.
HTH,
Marc
On Jul 15, 2010, at 3:01 PM, Jonathan Christensen wrote:
> Out of curiosity, is this a change in 2.11? I'm still runnning 2.10.1,
> ?write.csv mentions the other options being ignored, but not append. This
> might also explain why John Kane believes he has successfully used append
> with write.csv in that past.
>
> Jonathan
>
>
> On Thu, Jul 15, 2010 at 9:36 AM, Marc Schwartz <marc_schwa...@me.com> wrote:
> On Jul 15, 2010, at 9:41 AM, Cliff Clive wrote:
>
> >
> > I'm running R 2.11.0 on a 32-bit Windows XP machine. Whenever I try to
> > write
> > a csv file with 'append' set to TRUE, I get this message: attempt to set
> > 'append' ignored.
> >
> > Obviously, this is no good, since R is deleting my previously saved data
> > files, rather than appending to them. What can I do to fix this?
>
>
> Read ?write.csv more carefully:
>
> In the "CSV files" section:
>
> These wrappers are deliberately inflexible: they are designed to ensure that
> the correct conventions are used to write a valid file. Attempts to change
> append, col.names, sep, dec or qmethod are ignored, with a warning.
>
>
> If you want to use 'append', you will need to use write.table() and adjust
> the other arguments as you require.
>
> HTH,
>
> Marc Schwartz
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
