Re: [R] xyplot plot with groups

On Fri, Aug 20, 2010 at 4:03 PM, array chip wrote: > What a simple way to do what I want to do! Thanks. > > But if there is missing data in variable "y", then the averaged lines is > broken > where the missing data is present. For example: > > dat$y[c(10,185,200,400,450)]<-NA > > then using type=

Re: [R] xyplot plot with groups

7;), panel=function(...) {panel.xyplot(...); panel.superpose(..., col=c(1:3), panel.groups=function(...) panel.average(..., fun=function(x) mean(x,na.rm=T),horizontal=F))}) Thanks John From: Dennis Murphy Cc: r-help@r-project.org Sent: Fri, Augus

Re: [R] xyplot plot with groups

Hi: Like this? xyplot(y~day|sex, groups=trt, data=dat, type=c('p','g', 'a')) The 'a' stands for average line, or 'connect the averages at different x values'. By using the groups = trt argument, you get one line per treatment group in each panel. A complete list of valid types is given on p. 75

[R] xyplot plot with groups

Hi, I am a beginner of xyplot() (or lattice package). On one hand, I immediately realized it's a very powerful utility. On the other hand, there are too many things for me to learn. Still haven't figure out a generalization of the syntax and usage under many different circumstances. Let me giv