[R] Use or ??

[McGuire, Rhydwyn]

Have a look at the documentation for ifelse() http://stat.ethz.ch/R-manual/R-devel/library/base/html/ifelse.html that should do what you need. 

Rhydwyn 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Sapana Lohani
Sent: Wednesday, August 29, 2012 10:06 AM
To: R help
Subject: [R] Use or ??

Hi, My data frame looks like

A B C 

a b a 

x y z 


I want to add a new column which says "y" if either A or B matches with C and "n" if there is no match. How can I do that?

Thanks

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