Dear friends - this is a very simple question - I have a data frame 'data.frame': 87 obs. of 3 variables: $ ID : int 1 1 1 2 2 2 3 3 3 4 ... $ prep : num 1.18 1.38 1.34 1.93 2.38 2.24 1.17 1.13 1.21 1.89 ... $ postp: num 0.63 0.71 0.75 1.01 1.12 1.07 0.87 0.64 0.7 0.8 ...
- 29 persons (ID) each measured three times before and after an intervention: prep and postp -
I need data rearranged like ID time val 1 1 prep 1 2 postp 1 1 1 2 1 1 1 2 I cannot make reshape or stack do the trick. I'm on windows 7 R version 2.15.2 (2012-10-26) Best wishes Troels Ring, Nephrology Aalborg, Denmark ______________________________________________ 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.