[R] Removing variables from data frame with a wile card

Rolf Turner r@turner @end|ng |rom @uck|@nd@@c@nz
Mon Feb 13 02:33:25 CET 2023

On Sun, 12 Feb 2023 14:57:36 -0800
Jeff Newmiller <jdnewmil using dcn.davis.ca.us> wrote:

> x["V2"]
> is more efficient than using drop=FALSE, and perfectly normal syntax
> (data frames are lists of columns).


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.



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Department of Statistics
University of Auckland
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