On Sun, Mar 4, 2012 at 8:04 AM, Hed Bar-Nissan <hed.barnis...@gmail.com> wrote: > Following David example if i just wanted to do means > would multiplying the cases according to the weight do the work?
If the weights are scaled to have mean 1, and you have no missing data, then yes. If you have missing data, the scaling to mean 1 would be different for different variables. > > Something like this on a data.frame > (Must be a simpler way to do it with R - the sapply scope confused me) Yes, there must. For a start, assign() is not your friend. You should either use a simple weighted.mean() function (your own or Frank Harrell's), or if you really want to package the weights with the data, you would be better off doing it thoroughly and using the survey package. -thomas -- Thomas Lumley Professor of Biostatistics University of Auckland ______________________________________________ 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.
