[R] Multiple logical operations in a subscript

[Peter Alspach]

Mark

Try

dataframe$newvariable[data$oldvariable %in% c("X","Y","Z")] <- "group1" 

HTH ...

Peter Alspach

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Mark Na
> Sent: Friday, 19 September 2008 12:11 p.m.
> To: R-help at stat.math.ethz.ch
> 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
> 
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