[R] stringsAsFactors has no impact in expand.grid()?

[Gabor Grothendieck]

It works for me.  Try a more recent version of R.

> a <- c("PR", "NC", "A2", "BS")
> b <- c(1, 0.5, 0.25, 0.125, 0.0625, 0.03125)
>
> class(expand.grid(a, b, stringsAsFactors=FALSE)[[1]])
[1] "character"
> class(expand.grid(a, b, stringsAsFactors=TRUE)[[1]])
[1] "factor"

> R.version.string
[1] "R version 2.9.1 RC (2009-06-19 r48804)"


On Thu, Jun 25, 2009 at 7:21 AM, Rainer M Krug<r.m.krug at gmail.com> wrote:
> Hi
>
> I have the feeling, that the argument stringsAsFactors has no impact in the
> function expand.grid:
>
> a <- c("PR", "NC", "A2", "BS")
> b <- c(1, 0.5, 0.25, 0.125, 0.0625, 0.03125)
>
> class(expand.grid(css, fscs, stringsAsFactors=FALSE)[[1]])
> [1] "factor"
> class(expand.grid(css, fscs, stringsAsFactors=TRUE)[[1]])
> [1] "factor"
>
> Also, when I look at the code of expand.grid,  stringsAsFactors does not
> occur in the code.
>
> Am I missing something?
>
>> version
>               _
> platform       i486-pc-linux-gnu
> arch           i486
> os             linux-gnu
> system         i486, linux-gnu
> status
> major          2
> minor          9.0
> year           2009
> month          04
> day            17
> svn rev        48333
> language       R
> version.string R version 2.9.0 (2009-04-17)
>
> Cheers,
>
> Rainer
> --
> Rainer M. Krug, Centre of Excellence for Invasion Biology, Stellenbosch
> University, South Africa
>
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>
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