Dear R-users.. I hope the following scenario is more explanatory of my question..
Continuous variables: AGE, WEIGHT, HEIGHT Categorical variables: Group, Sex, Race I would like to find a correlation between WEIGHT and AGE, grouped by "Group","Sex", and "Race". Is the following formula correct? tapply(dat$WEIGHT, by=list(dat$AGE,as.factor(dat$Group),as.factor(dat$EX),as.factor(dat$RACE)),cor) Thanks, Santosh On Tue, Jul 14, 2009 at 7:34 PM, Santosh <santosh2...@gmail.com> wrote: > Hi R-users, > > Was wondering if there is a way to quickly compute correlations between > continuous variables grouped by some categorical variables? > > What function do I use? > > Thanks much in advance. > > Regards, > Santosh > [[alternative HTML version deleted]] ______________________________________________ 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.