On Feb 23, 2013, at 6:28 AM, Tasnuva Tabassum wrote: > I have a longitudinal competing risk data of the form: > > ID COMPL SEX HEREDITY > 1 0 1 2 > 1 0 1 2 > 1 3 1 2 > 2 0 0 1 > 2 1 0 1 > 2 2 0 1 > 2 2 0 1 > 3 0 0 1 > 3 0 0 1 > 3 0 0 1 > 3 0 0 1 > 3 2 0 1 > 4 0 1 2 > 4 0 1 2. > > Where, COMPL= health complication of diabetic patients which has value > labels as 0= no complication,1=coronary heart disease, 2=retinopathy, 3= > nephropathy. > > > I want to select only the first complication that occurred to each patient. > What R function can I use? >
> dat[ with(dat, ave(COMPL, ID, FUN=function(x) cumsum(x>0) ) ) ==1,] ID COMPL SEX HEREDITY 3 1 3 1 2 5 2 1 0 1 12 3 2 0 1 > [[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. David Winsemius Alameda, CA, USA ______________________________________________ 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.