Hello together, i have a little problem, maybe anyone can help me. I have 2 data.frame, one look like this one:
FS_ID ABNR 9327 33688812 11391 33688812 11392 33688812 11388 33688812 11390 33688812 12028 33688812 12029 33688812 the other data.frame looks like as follows: FS_ID DATE POST 11390 2012-12-13 28 12029 2013-01-17 28.3 what i am looking for, is a result, which look like this one: ABNR FIRST SECOND 33688812 28 28.3 The ABNR and the "POST"-Value of my second data.frame should stand in one row. The earlier date value should stand under "FIRST", the newer date under "SECOND". Maybe anyone can help me, how i can do this. Best regards. Mat -- View this message in context: http://r.789695.n4.nabble.com/combine-2-data-frames-in-dependence-of-the-ID-tp4685781.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.