On Sun, Oct 17, 2010 at 10:01 AM, Coen van Hasselt
<coenvanhass...@gmail.com> wrote:
> Hi all,
>
> Using xyplot I want to print to Y variables (y1, y2) versus X, conditional
> on the group.
> How can I obtain a line (type="l") for one relationship (ie. y1 ~ x) and
> points (type="p") for the other (y2 ~ x) ?
>
> library(lattice)
>
> # create some sample data
> df<-data.frame(group=as.factor(c(rep("a",4), rep("b",4))), # grouping
> variable for conditional plots
> x=c(1:4,1:4), # x variable
> y1=rnorm(4,0,1), # y1
> y2=rnorm(4,0,1)) # y2
>
>
> # Basically I want this plot, but then for y1~x points and for y2~x lines.
> xyplot(y1+y2 ~ x|group, data=df)
>
> # This works, but then I get the same plot in the two grouping windows
> because conditioning is lost in the panel function.
> xyplot(y1+y2 ~ x|group, data=df, type="l",
> panel=function(...){panel.xyplot(df$x,df$y1);
> panel.xyplot(df$x,df$y1, type="l")})
Try:
xyplot(y1+y2 ~ x|group, data=df, type=c("l","p"),
panel=panel.superpose, distribute.type = TRUE)
> Thanks for your help.
>
> Coen
--
Prasenjit
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