## 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
>
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