[R] lattice: adding text to plots

[Gabor Grothendieck]

Could you explain what "does not work" means.  It seems to produce a
graph with x-y numbers on it in R 2.4.0 on Windows.

At any rate, I would have done it like this although I think you can
leave off the [1] on subscripts and it will still work.

library(lattice)
library(grid)
xyplot(y1 + y2 ~ x | g * h, data = DF, type = "l",
   panel = function(x, y, subscripts, groups, ...) {
      panel.xyplot(x, y, ...)
      grid.text(DF$f[subscripts[1]], .1, .9)
})


On 10/9/06, Ritwik Sinha <ritwik.sinha at gmail.com> wrote:
> Hi Everyone,
>
> I know there was a thread recently that dealt with a similar issue,
> but this one is a little different.
>
> I have the following data frame
>
> DF <- data.frame(x = 1:12, y1 = rnorm(12), y2 = rnorm(12), g =
> gl(2,6), h = rep(c("1", "2"), 6), f = c(rep(c("1-1","1-2"),3),
> rep(c("2-1","2-2"),3)))
>
> I essentially want this plot
>
> xyplot(y1+y2~x|g*h, data=DF, type="l")
>
> However, now I want to add a different text to each panel, the text
> being from column "f" of the data frame. In other words, I want text
> "1-1" in the panel where g=1 and h=1 and so on. I tried to pass groups
> and subscript to the panel function but could not get what I was
> looking for. The following attempt does not work.
>
> xyplot(y1+y2~x|g*h, data=DF, type="l", auto.key=TRUE,
>        panel=function(x,y,..., groups, subscripts){panel.xyplot(x,y,...);
>        panel.text(x=4,y=0, labels=DF$f[subscripts])})
>
> My R version is 2.2.1 and lattice version is  0.12-11 (sorry they are
> not the latest ones, these are on the server).
>
> --
> Ritwik Sinha
> Graduate Student
> Epidemiology and Biostatistics
> Case Western Reserve University
> ritwik.sinha at gmail.com | +12163682366 | http://darwin.cwru.edu/~rsinha
>
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