You could use merge() or %in%. Best, Ulrik
Mark Sharp <msh...@txbiomed.org> schrieb am Mo., 27. März 2017, 22:20: > Make some small dataframes of just a few rows that illustrate the problem > structure. Make a third that has the result you want. You will get an > answer very quickly. Without a self-contained reproducible problem, results > vary. > > Mark > R. Mark Sharp, Ph.D. > msh...@txbiomed.org > > > > > > > On Mar 27, 2017, at 3:09 PM, Paul Bernal <paulberna...@gmail.com> wrote: > > > > Dear friends, > > > > I have one dataframe which contains 378 observations, and another one, > > containing 362 observations. > > > > Both dataframes have two columns, one date column and another one with > the > > number of transits. > > > > I wanted to come up with a code so that I could fill in the dates that > are > > missing in one of the dataframes and replace the column of transits with > > the value NA. > > > > I have tried several things but R obviously complains that the length of > > the dataframes are different. > > > > How can I solve this? > > > > Any guidance will be greatly appreciated, > > > > Best regards, > > > > Paul > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > > 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. > > CONFIDENTIALITY NOTICE: This e-mail and any files and/or...{{dropped:10}} > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.