Deepayan, thank you for your help!! After much trial and error (and re-reading the help files), I was able to come up with what I wanted by making sure the first line of my panel function looked like this:
panel = function(y,x,...) The complete set of code I ended up using: barchart(yield ~ variety | site, data = barley, groups = year, layout = c(1,6), stack = TRUE, auto.key = list(points = FALSE, rectangles = TRUE, space = "top"), scales = list(x = list(abbreviate = TRUE, minlength = 5, rot = 45)), panel = function(y,x,...){ panel.grid(h = -1, v = 0, col = "gray", lty = "dotted") panel.barchart(x,y,...) panel.text(x,y,label = round(y,1),cex=.8) } ) Thank you for your work on the lattice package! ~Nick -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Deepayan Sarkar Sent: Wednesday, January 25, 2006 11:30 AM To: Drew Cc: r-help@stat.math.ethz.ch Subject: Re: [R] panel function with barchart (lattice) On 1/25/06, Drew <[EMAIL PROTECTED]> wrote: > Folks at R help, > > I can't quite get the panel function to work the way I > want within barchart. > I guess I'm still not understanding how to piece > together multiple panel > arguments, especially when "groups" is specified. > > Example: I want to be able to add the value of "yield" > to each section of > each bar in this graph: > > barchart(yield ~ variety | site, data = barley, > groups = year, > layout = c(1,6), > stack=TRUE, > ylab = "Barley Yield (bushels/acre)" > ) > > To do this, I add my panel function: > > barchart(yield ~ variety | site, data = barley, > groups = year, > layout = c(1,6), > stack=TRUE, > ylab = "Barley Yield (bushels/acre)", > > panel = function(x,y,subscripts,groups,...){ > panel.barchart(x,y,...) Well, panel.barchart needs the subscripts and groups arguments to draw stacked bar charts, and you are calling it without them. > ltext(x = x, y = y, label = > round(barley$yield[subscripts],1), cex=.8) The y values will need to be accumulated. Have you looked at what panel.barchart does? > } > ) > > Then I get the values to print on each bar (which is > what I want) but the > bars no longer stack to appropriate height, and I > cannot get the subsections > of each bar to be a different color. I've tried > numerous variations of > panel.barchart, panel.superpose, etc. using examples > from ?xyplot, but > nothing quite works or I get an error message. > > Any help would be appreciated. > > ~Nick > > ______________________________________________ > 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 > -- http://www.stat.wisc.edu/~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 ______________________________________________ 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