Hello Bikek, please use dput() next time to provide the data, its easier to use that.
also: looking at the data provided, how would you want to decide which value of the non-unique times to retain? Just take the first one? They aren't all the same. On 30.11.2012, at 16:59, bibek sharma wrote: > Hello user, > I have large data containing subject id, time and response where > subjects are measured repeatedly. However some time are duplicates. I > only want data with unique time points per id. I mean if time is > repeated, then take only one. > Here is a sample data. > > id time res > 1 2 0.64 > 1 3 0.78 > 1 3 6.5 > 1 3 4.5 > 1 4 4 > 1 5 3.4 > 2 10 5.7 > 2 11 5.8 > 2 11 9.3 > 2 11 3.4 > 2 12 3.4 > 2 13 6.7 > 3 3 5.6 > 3 3 3.4 > 3 4 2.3 > 3 5 5.6 > 3 12 9.8 > 3 10 7 > 3 24 6 > 3 16 4 > > for 1st subject I want this, > > id time res > 1 2 0.64 > 1 3 0.78 > 1 4 4 > 1 5 3.4 > Any suggestions are much appreciated! > Thanks, > Bikek > > ______________________________________________ > 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. ______________________________________________ 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.
