I need advice on how to create a variable that is the group mean of another variable.
For example, I have a variable called x for which each row in the data set has a value. I also have a nominal variable called g that indicates which of 100 different groups each row belongs to. So, I want to create a new variable called w, which is the group mean of x for which ever group the row belongs to (as indicated by variable g). Ideally, I'd also like to take out each row's value of x before calculating the group mean assigned to that row. I've already tried the aggregate command. That gives me the group means, but does not allow me to assign them to each row in the data set. THANKS! -- Casey A. Klofstad University of Miami Department of Political Science Coral Gables, FL [EMAIL PROTECTED] http://moya.bus.miami.edu/~cklofstad ______________________________________________ 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.
