Mark
Try
dataframe$newvariable[data$oldvariable %in% c("X","Y","Z")] <- "group1"
HTH ...
Peter Alspach
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Mark Na
> Sent: Friday, 19 September 2008 12:11 p.m.
> 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
>
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