xyplot multiple conditions and empty panels
On Fri, Feb 6, 2009 at 1:15 PM, Sebastien Bihorel
<Sebastien.Bihorel at cognigencorp.com> wrote:
Dear R-users,
Is it possible to prevent xyplot from drawing empty panels when using
multiple conditions and when the dataset has a incomplete set of condition
combinations - like in the following example?
I have tried to modify the drop.unused.levels argument but without any
success.
Any help and suggestions will be appreciated.
Sebastien
####
df <- data.frame(id=c(1,1,2,2,1,1,3,3,4,4),
grp=c(1,1,1,1,2,2,2,2,2,2),
x=1:10,
y=1:10,
z=jitter(1:10))
xyplot(y+z~x|id*grp,
data=df,
type=c("p","l"),
distribute.type = T,
pch=3,
col=c(1,2),
xlab="x axis",
ylab="y axis")
####
Levels are dropped for individual terms, not their combinations. If you mean to use the combination as a term, do so explicitly: xyplot(y+z~x | interaction(id, grp), df) -Deepayan