[R] groups in lattice

[Renaud Lancelot]

See the argument panel.groups in panel.superpose.

library(lattice)
dfr <- data.frame(y = c(rnorm(10, 5, 1), rnorm(10, -5, 1)),
                  x = rep(runif(10), 2),
                  g = rep(c("a", "b"), each = 10))
xyplot(y ~ x, groups = g, data = dfr,
       panel = function(...){
         panel.superpose(..., panel.groups = "panel.xyplot")
         panel.superpose(..., panel.groups = "panel.lmline")
         })

Renaud

2007/11/2, Ruud H. Koning <r.h.koning at rug.nl>:
> Hello, I must be missing something very obvious. I have a dataset with
> consists of three groups, and for each group I would like to draw a
> regression line in one frame. Something like
>
> plot.a <- xyplot(result~price,data=nl,
>  xlab="Standardized price",ylab="Outcome",groups=slice,
>  panel=function(x,y,...){
>   panel.lmline(x,y,...)
>  }
> )
>
> However, only one line is drawn. If I replace panel.lmline by
> panel.densityplot(x,...), I do get three densityplots in the frame. What
> am I missing?
> Thanks, Ruud
>
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-- 
Renaud LANCELOT
Département Systèmes Biologiques du CIRAD
CIRAD, Biological Systems Department

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