Complain, complain... x[ names( x ) != "V2" ]
or x[ ! names( x ) %in% c( "V2", "V3" ) ] or any other character or logical or integer expression that selects columns you want... On February 12, 2023 6:38:00 PM PST, Steven Yen <st...@ntu.edu.tw> wrote: >x[“V2”] would retain columns of x headed by V2. What I need is the opposite——I >need a data grime with those columns excluded. > >Steven from iPhone > >> On Feb 13, 2023, at 9:33 AM, Rolf Turner <r.tur...@auckland.ac.nz> wrote: >> >> >>> On Sun, 12 Feb 2023 14:57:36 -0800 >>> Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: >>> >>> x["V2"] >>> >>> is more efficient than using drop=FALSE, and perfectly normal syntax >>> (data frames are lists of columns). >> >> <SNIP> >> >> I never cease to be amazed by the sagacity and perspicacity of the >> designers of R. I would have worried that x["V2"] would turn out to be >> a *list* (of length 1), but no, it retains the data.frame class, which >> is clearly the Right Thing To Do. >> >> cheers, >> >> Rolf >> >> -- >> Honorary Research Fellow >> Department of Statistics >> University of Auckland >> Stats. Dep't. phone: +64-9-373-7599 ext. 89622 >> Home phone: +64-9-480-4619 >> -- Sent from my phone. Please excuse my brevity. ______________________________________________ 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.
