Or to return a logical value, i.e., TRUE if the column contains the value,
FALSE if it does not:
any( x[,2] == 'A501' )
-Don
--
Don MacQueen
Lawrence Livermore National Laboratory
7000 East Ave., L-627
Livermore, CA 94550
925-423-1062
Lab cell 925-724-7509
On 8/13/18, 12:09 AM, "R-help on behalf of Albrecht Kauffmann"
<r-help-boun...@r-project.org on behalf of alkau...@fastmail.fm> wrote:
Hello Deepa,
sum(x[,2] == "A501")
or
which(x[,2] == "A501")
.
Best,
Albrecht
--
Albrecht Kauffmann
alkau...@fastmail.fm
Am Mo, 13. Aug 2018, um 07:10, schrieb Deepa Maheshvare:
> Hello Everyone,
>
> I have a 1000 x 20 matrix. The second column of the matrix has the names
> of identifiers. How do I check when a certain identifier is present in
> the set of 1000 identifier names present in the second column. For
> instance, let the names of identifiers be A1,A2,...A1000. I want to
> check whether A501 is present .How can this be checked?
>
> Any help will be highly appreciated.
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
______________________________________________
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.
