It's really weighting - it's just that my simplified example was too simplified Here is my real weight vector: > sc$W_FSCHWT [1] 14.8579 61.9528 3.0420 2.9929 5.1239 14.7507 2.7535 2.2693 3.6658 8.6179 2.5926 2.5390 1.7354 2.9767 9.0477 2.6589 3.4040 3.0519 ....
And still it should somehow set the case weight. I could multiply all by 10000 and use maybe your method but it would create such a bloated dataframe working with numeric only i could probably create weighted means But something simple as WEIGHTED BY would be nice. tnx Hed On Thu, Feb 23, 2012 at 7:43 PM, David Winsemius <dwinsem...@comcast.net>wrote: > > On Feb 23, 2012, at 10:49 AM, Hed Bar-Nissan wrote: > > The need comes from the PISA data. (http://www.pisa.oecd.org) >> >> In the data there are many cases and each of them carries a numeric >> variable that signifies it's weight. >> In SPSS the command would be "WEIGHT BY" >> >> In simpler words here is an R sample ( What is get VS what i want to >> get ) >> >> >> data.recieved <- data.frame( >>> >> + kindergarten_attendance = factor(c(2,1,1,1), labels = c("Yes", "No")), >> + weight=c(10, 1, 1, 1) >> + ); >> >>> data.recieved; >>> >> kindergarten_attendance weight >> 1 No 10 >> 2 Yes 1 >> 3 Yes 1 >> 4 Yes 1 >> >>> >>> >>> >>> data.weighted <- data.frame( >>> >> + kindergarten_attendance = factor(c(2,2,2,2,2,2,2,2,2,2,**1,1,1), >> labels = >> c("Yes", "No")) ); >> > > You want "case repetition" not case weighting, which I would use as a term > when working on estimation problems: > > > ( data.weighted <- unlist(sapply(1:NROW(data.**recieved), function(x) > rep(data.recieved[x,1], times=data.recieved[x,2] )) ) ) > [1] No No No No No No No No No No Yes Yes Yes > Levels: Yes No > > > >>> >>> par(mfrow=c(1,2)); >>> plot(data.recieved$**kindergarten_attendance,main="**What i get"); >>> plot(data.weighted$**kindergarten_attendance,main="**What i want to >>> get"); >>> >> > Seems to work with the factor vector, although I didn't replicate > dataframe rows, but I guess you could. > > >>> >> tnx in advance >> Hed >> >> [[alternative HTML version deleted]] >> >> ______________________________**________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> >> PLEASE do read the posting guide http://www.R-project.org/** >> posting-guide.html <http://www.R-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > David Winsemius, MD > West Hartford, CT > > [[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.
