[R] searching for a specific row name in R

Albrecht Kauffmann @|k@u||m @end|ng |rom |@@tm@||@|m
Mon Aug 13 09:09:23 CEST 2018

Hello Deepa,

sum(x[,2] == "A501")
which(x[,2] == "A501")

  Albrecht Kauffmann
  alkauffm using 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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