You'll probably want to look at the 'by' function d=data.frame(sex=rep(1:2,50),x=rnorm(100)) d$y=d$x+rnorm(100) head(d) cor(d) by(d[,-1],d['sex'],function(df)cor(df))
You might also want to look at the doBy package -- View this message in context: http://n4.nabble.com/Mutliple-sets-of-data-in-one-dataset-Need-a-loop-tp1018503p1018616.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org 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.
