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-bounces at r-project.org on behalf of alkauffm at fastmail.fm>
wrote:
Hello Deepa,
sum(x[,2] == "A501")
or
which(x[,2] == "A501")
.
Best,
Albrecht
--
Albrecht Kauffmann
alkauffm at 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]]
>
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R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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PLEASE do read the posting guide R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.