For loop
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
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