> I would like to join repeated measures for patients across two visits using
> a line. The program below uses symbols to represent each patient. Basically,
> I would like to join each pair of symbols.
This is easy in ggplot:
install.packages("ggplot")
library(ggplot)
qplot(visit, var, id=patient, type=c("line", "point"), colour=factor(patient))
Regards,
Hadley
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