[Rd] warning in lattice key function

[Prof Brian Ripley]

This is not the address for the maintainer of package 'lattice': what 
did he say when you asked him (see the posting guide)?

(Because I reported it some weeks back, I know he agrees it is a bug in 
lattice and will be fixed in the next release.)

On 16/08/2012 04:05, Richard M. Heiberger wrote:
> ## this example shows a problem in key.
> tmp <- data.frame(y=rnorm(10), g=rep(ordered(c("A","B")), 5))
> bwplot(y ~ g, data=tmp,
>         key=list(
>           text=list(c("A","B"), col=c("blue","red")),
>           points=list(pch=c(17, 16), col=c("blue","red")),
>           space="top", columns=2, border=TRUE,
>           title="Treatment", cex.title=.9
>           )
>         )
> ## The example works without warning messages in 2.15.1.
> ## I first detected the problem in
> ##### R Under development (unstable) (2012-07-24 r59961) ## windows
> ##### R Under development (unstable) (2012-08-02 r60091) ## macintosh
> ## The problem still exists in
> ## R Under development (unstable) (2012-08-13 r60245) -- "Unsuffered
> Consequences"
> ## downloaded from lib.stat.cmu.edu Wed Aug 15 2012 11PM EST
>
>
>> tmp <- data.frame(y=rnorm(10), g=rep(ordered(c("A","B")), 5))
>> bwplot(y ~ g, data=tmp,
> +        key=list(
> +          text=list(c("A","B"), col=c("blue","red")),
> +          points=list(pch=c(17, 16), col=c("blue","red")),
> +          space="top", columns=2, border=TRUE,
> +          title="Treatment", cex.title=.9
> +          )
> +        )
> Warning messages:
> 1: In FUN(X[[9L]], ...) : 'x' is NULL so the result will be NULL
> 2: In FUN(X[[9L]], ...) : 'x' is NULL so the result will be NULL
> 3: In FUN(X[[9L]], ...) : 'x' is NULL so the result will be NULL
> 4: In FUN(X[[9L]], ...) : 'x' is NULL so the result will be NULL
> 5: In FUN(X[[9L]], ...) : 'x' is NULL so the result will be NULL
>> version
>                 _
> platform       i386-w64-mingw32
> arch           i386
> os             mingw32
> system         i386, mingw32
> status         Under development (unstable)
> major          2
> minor          16.0
> year           2012
> month          08
> day            13
> svn rev        60245
> language       R
> version.string R Under development (unstable) (2012-08-13 r60245)
> nickname       Unsuffered Consequences
>>
>
> 	[[alternative HTML version deleted]]
>
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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