On 7/30/07, Patrick Drechsler <[EMAIL PROTECTED]> wrote: > Hi, > > what is the recommended way of adding a strip to a lattice plot?
See ?strip.default. > In the example below I would like to add the value of mean(y) to a new > strip.: > > --8<---------------cut here---------------start------------->8--- > library(lattice) > > ## Small sample data set: > p0 <- xyplot(uptake ~ Type | Treatment, data = CO2) > > p1 <- update(p0, > panel = function(x, y, ...) { > panel.xyplot(x, y) > panel.abline(h = mean(y), > col = "red" > ) > } > ) > > plot(p1) > --8<---------------cut here---------------end--------------->8--- That's not what strips are for. Strips are used for showing information about the levels of conditioning variables. You can instead do something like this: update(p0, panel = function(x, y, ...) { require(grid) panel.xyplot(x, y, ...) panel.abline(h = mean(y), col = "red") grid.text(round(mean(y), 3), 0.5, 1, vjust = 1.2) }) The text can be put into a rectangle, to make them look like strips, and you could use a prepanel function to make sure there's enough space for it. Look up grid documentation for details. There are other workarounds, e.g., using 'trellis.focus' and 'lattice.panelArgs'. -Deepayan ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.