[R] do.call in 2.3.0 vers 2.3.x

[Prof Brian Ripley]

This is nothing to do with do.call, but with rbind.data.frame.  It is 
already fixed in R-patched:

     o   rbind()ing dataframes with a single row could lead to a
         corrupt data frame (a problem with the fix to PR#8506).

(and the example works in R-patched and R-devel).

The strange thing is that three people have now reported this after 
release, but no alpha- or beta- tester did.  Please can people help with 
the pre-release testing, not report post-release?


On Thu, 4 May 2006, Dieter Menne wrote:

> Dear R-Core,
>
> after switching to 2.3.0, all my trusted do.call constructs that worked in
> 2.2 and earlier fail. I noted that changes were introduced to do.call, but I
> could not find out how these relate to my problem.
>
> The following example works in 2.2 and earlier, but fails because rownames
> are partially NA. I can correct this by manually adding row names, but it's
> a bit of work to check this in all my code.
>
> Dieter
>
> ------
>
> wby = by(warpbreaks[, 1:2], warpbreaks$tension,
>  function(x) {
>    data.frame(breaks=mean(x$breaks),var=var(x$breaks))
>  }
>  )
>
> cd = do.call("rbind",wby)
> row.names(cd)
> cd
>
> ---- Output in 2.3.0
>> row.names(cd)
> [1] NA    "NA1" "NA2"
>> cd
> Error in data.frame(breaks = c("36.38889", "26.38889", "21.66667"), var =
> c("270.48693",  :
>        row names contain missing values
>>
>
> ----
> platform       i386-pc-mingw32
> arch           i386
> os             mingw32
> system         i386, mingw32
> status
> major          2
> minor          3.0
> year           2006
> month          04
> day            24
> svn rev        37909
> language       R
> version.string Version 2.3.0 (2006-04-24)
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595