In each category, the order is the same. Fro example, the first match in dat2 should return to the first record in dat2
On Tue, May 7, 2013 at 11:31 AM, Chris Stubben <stub...@lanl.gov> wrote: > Yes, I tried, but the order of the IDs in dat1 and dat2 is not exactly the >> same, I simplify the data here. So in dat2, it may have records for >> ID=0002 >> first then ID=0001, also I have more than two categories under ID col >> > > I should have looked at the question more closely, sorry. Unique ids in > raw datasets > are pretty important, especially if observations are split into different > files and you are trying to join them later. How do you know for ID 0001 > and obs 1 that height is 3.2 and not 2.6, especially if order in the two > files are "not exactly the same". > > > Chris > > > > -- > > Chris Stubben > > Los Alamos National Lab > Bioscience Division > MS M888 > Los Alamos, NM 87545 > > ______________________________**________________ > 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. > [[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.
