[R-SIG-Mac] warning on macintosh 2.16 that is not on 2.15.2 or on windows

[Prof Brian Ripley]

This is about lattice not using rep() correctly.  There is no '2.16' and 
never will be (see the posting guide).

 From the NEWS for R-devel:

       \item The undocumented use \code{rep(NULL, length.out = n)} for
       \code{n > 0} (which returns \code{NULL}) now gives a warning.

Deepayan is aware of at least some of the uses in lattice, but you could 
report this one too.


On 20/10/2012 03:21, Richard M. Heiberger wrote:
> mylegend <-
> structure(list(bottom = structure(list(fun = "draw.key", args =
> structure(list(
>      key = structure(list(y = -0.2, x = 0.15, points = structure(list(
>          col = c("red", "blue"), pch = c(16, 17)), .Names = c("col",
>      "pch")), text = structure(list(c("TREATMENT A (N=216)", "TREATMENT B
> (N=431)"
>      ), col = c("red", "blue"), cex = 0.9), .Names = c("", "col",
>      "cex")), columns = 2, between = 0.5, space = "bottom"), .Names = c("y",
>      "x", "points", "text", "columns", "between", "space")), draw = FALSE),
> .Names = c("key",
> "draw"))), .Names = c("fun", "args"))), .Names = "bottom")
>
>
> lattice:::evaluate.legend(mylegend)
>
>
> On Macintosh 2.16
> version.string R Under development (unstable) (2012-10-18 r60960)
> I get a warning
>
>> lattice:::evaluate.legend(mylegend)
> $bottom
> $bottom$obj
> frame[plot_01.key.frame]
>
>
> 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
>>
>
> On Macintosh
> R version 2.15.2 RC (2012-10-18 r60960)
> it works normally
>> lattice:::evaluate.legend(mylegend)
> $bottom
> $bottom$obj
> frame[.key.frame]
>
>
>>
>
>
> On Windows, it works normally
> version.string R version 2.15.1 (2012-06-22)
>
>> lattice:::evaluate.legend(mylegend)
> $bottom
> $bottom$obj
> frame[plot_01.key.frame]
>
>
>>
>
>
>
> This is the Macintosh trace
>
>> trace(lattice:::evaluate.legend, exit=recover)
> Tracing function "evaluate.legend" in package "lattice
> (not-exported)"
> [1] "evaluate.legend"
>> lattice:::evaluate.legend(ae.tr$legend)
> Tracing lattice:::evaluate.legend(ae.tr$legend) on exit
>
> Enter a frame number, or 0 to exit
>
> 1: lattice:::evaluate.legend(ae.tr$legend)
>
> Selection: 1
> Called from: .doTrace(recover(), "on exit")
> Browse[1]> ls()
> [1] "fun"    "i"      "legend"
> 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
> Browse[1]> fun
> frame[plot_01.key.frame]
> Browse[1]> i
> [1] 1
> Browse[1]> legend
> $bottom
> $bottom$obj
> frame[plot_01.key.frame]
>
>
> Browse[1]> Q
>>
>
>
>
> This is the Windows trace
>
>> trace(lattice:::evaluate.legend, exit=recover)
> Tracing function "evaluate.legend" in package "lattice
> (not-exported)"
> [1] "evaluate.legend"
>> lattice:::evaluate.legend(ae.tr$legend)
> Tracing lattice:::evaluate.legend(ae.tr$legend) on exit
>
> Enter a frame number, or 0 to exit
>
> 1: lattice:::evaluate.legend(ae.tr$legend)
>
> Selection: 1
> Called from: .doTrace(recover(), "on exit")
> Browse[1]> ls()
> [1] "fun"    "i"      "legend"
> Browse[1]> fun
> frame[plot_01.key.frame]
> Browse[1]> i
> [1] 1
> Browse[1]> legend
> $bottom
> $bottom$obj
> frame[plot_01.key.frame]
>
>
> Browse[1]> Q
>>
>
>
>
> On Windows I have
> version.string R version 2.15.1 (2012-06-22)
>
> On Macintosh I have
> version.string R Under development (unstable) (2012-08-02 r60091)
>
> 	[[alternative HTML version deleted]]
>
> _______________________________________________
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> R-SIG-Mac at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>


-- 
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