Or simply subset(dat, a > 0)
HTH, Jorge.- On Thu, Mar 21, 2013 at 6:58 PM, Michael Weylandt <> wrote: > > > On Mar 21, 2013, at 7:39, Pierrick Bruneau <pbrun...@gmail.com> wrote: > > > Hi Borja, > > > > You may issue: > > > > attach(data) > > No -- bad idea -- dangerous -- confusing statefulness, etc. (See > explanations in the archives as to why) > > > > > which results in adding your column names to the search path of R for > name > > resolving. > > > > Pierrick Bruneau > > CRP Gabriel Lippmann > > > > > > On Wed, Mar 20, 2013 at 11:17 PM, Borja . <borjalato...@outlook.com> > wrote: > > > >> Good day. > >> I create a data frame like this: > >>> data <- data.frame(a=1:10,b=11:20,c=21:30) > >> I can subset this data.frame by saying: > >>> data[data$a>7,] > >> and I get this result > >> a b c 8 8 18 28 > >> 9 9 19 29 10 10 20 30 > >> I understand I should get the same result by saying > >>> data[a>7,0] > >> but I don't. Instead I get: > >> Error in `[.data.frame`(data, a > 7, 0) : object 'a' not > > Try instead > > with(dat, dat[a > 0, ]) > > for a cleaner option. > > MW > > > >> found > >> Thank you very much in advance > >> [[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. > > > > [[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. > > ______________________________________________ > 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. > [[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.
