I know the `quantcut' function in the gregmisc package, and using it, I'm able to use functions like aggregate to compute the mean or sd() in each quartile.
What if I have a data frame containing x and y, and I want to make quartiles by x, but then compute sum x / sum y in each quartile? How does one persuade aggregate to do this? Thanks, -- Ajay Shah Consultant [EMAIL PROTECTED] Department of Economic Affairs http://www.mayin.org/ajayshah Ministry of Finance, New Delhi ______________________________________________ [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
