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")})
Thanks for your help.
Coen
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