Hello list ! I have a huge data.frame with several variables observed on about 3000 persons. For every person (row) there is variable called GROUP which indices the group the person belongs to. There is also another variable AV for each person. Now i want to create a new variable which holds the group mean of AV as a value for each person. With tapply(AV,GROUP,mean) i get the means for each level of GROUP, but i cannot find out, how to give every person the groupmean as a value (every person should have the same value as every other person in the same group).
Has anybody any ideas how to do that ? Yours sincerly Felix Eschenburg ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
