Peter showed you the %in% operator, you may also want to look at the subset, transform, with, and within functions for future use as ways to reduce the need to type the name of an object multiple times.
Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare [EMAIL PROTECTED] 801.408.8111 > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > project.org] On Behalf Of Mark Na > Sent: Thursday, September 18, 2008 6:11 PM > To: [EMAIL PROTECTED] > Subject: [R] Multiple logical operations in a subscript > > Hello, > > I would like to select cases using multiple logical operations (e.g. X > or Y or Z) without having to repeat the dataframe$variable within the > subscript. My working code (with a single logical operator) currently > looks like this: > > dataframe$newvariable[data$oldvariable=="X"]<-"group1" > > I thought this next line of code might do what I wanted, but it > doesn't: > > dataframe$newvariable[data$oldvariable=="X" | "Y" | "Z"]<-"group1" > > I'd appreciate any suggestions. I've tried playing around with grep, > but > can't make it work. > > Thanks! Mark > > ______________________________________________ > R-help@r-project.org mailing list > 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 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.
