Overlaying several qqnorm curves in same frame
On 1/6/09, Assaf oron <assaf.oron at gmail.com> wrote:
Hi all, I want to create a rather standard overlaid qqnorm plot on a single variable, with different subgroups of the same dataset plotted using different colors/symbols/etc. (I don't want side-by-side, rather different-colored curves on the same graph) I managed to do it rather tediously using "lapply" and "split", and wondered whether there is any single-command shortcut. Is there anything on the "lattice" package perhaps?
Yes, use qqmath(~x, groups=...), e.g., qqmath(~ height, data = singer, groups = voice.part, auto.key = TRUE) -Deepayan