[R] "logical indexing, " [was] match() question or needle haystack problem for a data.frame

MacQueen, Don m@cqueen1 @end|ng |rom ||n|@gov
Mon Oct 29 17:13:01 CET 2018

Wrong comparisons, I think.

The opposite of
  A & B
  !(A & B)

There is no single operator that can replace the "&" in A & B that gives the "opposite"


Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
Lab cell 925-724-7509

On 10/25/18, 11:28 PM, "R-help on behalf of Knut Krueger" <r-help-bounces using r-project.org on behalf of rhelp using krueger-family.de> wrote:

    Am 25.10.18 um 16:13 schrieb peter dalgaard:
    > Yes: x[!(x$A %in% y$B),]
    Ok thats in my opinion a little workaround
    There is an
    = and !=
    < and >
    means the opposite is available between terms.
    why is there f.e no %!in%, %notin%  or !%in%
    This would be more intuitive.
    Kind regards Knut
    R-help using r-project.org mailing list -- To UNSUBSCRIBE and more, see
    PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
    and provide commented, minimal, self-contained, reproducible code.

More information about the R-help mailing list