[R] Alternative to xyplot()?

Ben Bolker bolker at ufl.edu
Wed Jul 18 03:13:51 CEST 2007

Manuel Morales <Manuel.A.Morales <at> williams.edu> writes:

> Sorry. I was thinking of the "groups" functionality, as illustrated
> below:
> grps<-rep(c(1:3),10)
> x<-rep(c(1:10),3)
> y<-x+grps+rnorm(30)
> library(lattice)
> xyplot(y~x,group=grps, type=c("r","p"))

  The points (type "p") are easy, the regression lines (type "r") are a little
harder. How about:

invisible(mapply(function(z,col) {abline(lm(y~x,data=z),col=col)},

    Ben Bolker

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