xyplot(X ~ time | center, type="l", panel=panel.superpose, groups=subject, col = treatment)
xyplot(X ~ time | center, groups = subject,
panel = function(x, y, ...){
panel.superpose(x, y, col = treatment, type = "l", ...)
})I get two different colours for the lines by these colours do not match the corresponding
treatment variable
Umberto
Umberto Maggiore wrote:
Using data from a multicenter study with a parallel-group design comparing
two treatments, I plotted each subject's time change of X after stratifying
for center:
xyplot(X ~ time | center, type="l", panel=panel.superpose, groups=subject)
Now I want these lines to take different colours according to the variable "treatment". Any help? Umberto
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xyplot(X ~ time | center, type="l", panel=panel.superpose, groups=subject, col = treatment)
might work, or more explicitely:
xyplot(X ~ time | center, groups = subject,
panel = function(x, y, ...){
panel.superpose(x, y, col = treatment, type = "l", ...)
})Best,
Renaud
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