[R] lattice - change background strip color in one panel

[P Ehlers]

On 2011-05-27 0:48, Coen van Hasselt wrote:
> Hello,
>
> I would like to change the background color in only -one- of the strips in a
> multipanel lattice xyplot, from the default yellow-brown color.
> Until now, I only managed to change the background strip color in all of the
> strips using the par.settings, but I do not get it to work for only 1 strip.
>
> Below is the current code I am using.
> The resulting plot is here:
> http://dl.dropbox.com/u/9788680/01_DoseIntensity_MonitoringInterval_BW.pdf
> (i.e. I'd like to color the "3 months" strip in red)
>
> xyplot(value~ant|paste(intv, "Months"), groups=perc, data=di,
>         type="b", layout=c(4,1),xlab="Prior anthracyclines",
> lty=c(1,2),lwd=2,col="black",main="Dose intensity ~ Monitorings Interval",
>         ylab="Dose intensity",
> scales=list(x=list(at=c(0,0.5,1)),y=list(at=seq(0,1,.1))),
>         par.settings = list(superpose.line=list(lwd=2,lty=1:2, col="black")),
>
>         auto.key = list(space = "right", points = FALSE, ncol=3,nrow=1, lines
> = TRUE, title="Percentiles", cex=.7, cex.title=.7, siz=6))
>
> I would greatly appreciate it if someone could guide me in the right
> direction!

See if this helps:

  xyplot(Sepal.Length ~ Sepal.Width | Species, data=iris,
   par.settings=list(strip.background=list(col=c('green','red','blue'))),
   strip = function(..., bg) {
     strip.default(...,
        bg = trellis.par.get("strip.background")$col[which.packet()])
   })

See ?strip.default.

Peter Ehlers

>
> Thanks
>
> Coen
>
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>
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