On Apr 26, 2010, at 10:12 AM, John Sorkin wrote:
> I would like to select rows if a row contains any one of several values. I
> can do the selection as follows:
>
> result[,"Subject"]=="JEFF" | result[,"Subject"]=="BG"
>
> But this is very unwieldily if one wishes to select many, many rows as one
> has to continuously repeat the source:
>
> result[,"Subject"]=="JEFF" | result[,"Subject"]=="BG" |
> result[,"Subject"]=="John" | result[,"Subject"]=="Mary"
>
> Is there an easier way? I tried the following but it did not work:
>
>
> result[,"Subject"]==c("JEFF" | "BG" | "John" | "Mary")
>
> Thanks,
> John
John,
Try:
subset(result, Subject %in% c("JEFF", "BG", "John", "Mary"))
See ?subset and ?"%in%"
HTH,
Marc Schwartz
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