Dear all, I apologize for the newbie question, but I'm stuck.
I have a data frame in the following form: dat<-as.data.frame(cbind(c("a","a","a","b","b"), c(1,2,3,3,2),c(4,3,5,4,4))) I need a way to generate a new dataframe with the average for each factor. The result should look like: res<-as.data.frame(cbind(c("a","b"), c(2,2.5),c(4,4))) Any help would be greatly appreciated. Jonathan [[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.