Re: [R] Check for presence of object in group of objects

From: ONKELINX, Thierry <Thierry.ONKELINX_at_inbo.be>
Date: Wed 31 Jan 2007 - 10:16:56 GMT


You need %in%

"a" %in% x
"d" %in% x


ir. Thierry Onkelinx

Instituut voor natuur- en bosonderzoek / Reseach Institute for Nature and Forest

Cel biometrie, methodologie en kwaliteitszorg / Section biometrics, methodology and quality assurance

Gaverstraat 4

9500 Geraardsbergen

Belgium

tel. + 32 54/436 185

Thierry.Onkelinx@inbo.be

www.inbo.be  

Do not put your faith in what statistics say until you have carefully considered what they do not say. ~William W. Watt

A statistical analysis, properly conducted, is a delicate dissection of uncertainties, a surgery of suppositions. ~M.J.Moroney

-----Oorspronkelijk bericht-----
Van: r-help-bounces@stat.math.ethz.ch [mailto:r-help-bounces@stat.math.ethz.ch] Namens Christoph Heibl Verzonden: woensdag 31 januari 2007 11:01 Aan: r-help@stat.math.ethz.ch
Onderwerp: [R] Check for presence of object in group of objects

Dear List,

must be simple, but i got stuck on this...

Ive been trying around for some time, but I could not find a straigthforward way to do this:
How can one ask if a certain object is element of a certain group of objects, e.g stored in a vector?

x <- c("a", "b", "c")
# is there a simple function which returns: is "a" part of x?
TRUE
is "d" part of x?
FALSE Thanks a lot
Christoph



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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. Received on Wed Jan 31 21:22:51 2007

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