Basic stuff! Either subscripting or ?subset.
There are many good R tutorials on the web. You should spend some (more?) time with some. Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Sat, Feb 11, 2017 at 9:02 PM, Val <valkr...@gmail.com> wrote: > Hi all, > I have a big data set and want to remove rows conditionally. > In my data file each person were recorded for several weeks. Somehow > during the recording periods, their last name was misreported. For > each person, the last name should be the same. Otherwise remove from > the data. Example, in the following data set, Alex was found to have > two last names . > > Alex West > Alex Joseph > > Alex should be removed from the data. if this happens then I want > remove all rows with Alex. Here is my data set > > df <- read.table(header=TRUE, text='first week last > Alex 1 West > Bob 1 John > Cory 1 Jack > Cory 2 Jack > Bob 2 John > Bob 3 John > Alex 2 Joseph > Alex 3 West > Alex 4 West ') > > Desired output > > first week last > 1 Bob 1 John > 2 Bob 2 John > 3 Bob 3 John > 4 Cory 1 Jack > 5 Cory 2 Jack > > Thank you in advance > > ______________________________________________ > 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. ______________________________________________ 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.
