This should get you started
tmp <- data.frame(y1=rnorm(62*5), y2=rnorm(62*5), time=rep(1:5, 62), id=factor(rep(1:62, each=5)) ) xyplot(y1 ~ y2 | id, data=tmp, group=time, pch=as.character(1:5)) tmp.aov <- aov(y1 ~ y2*factor(time) + Error(id), data=tmp) summary(tmp.aov) ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.