Try this:

c("mary", "sue") %in% c("mary", "bob", "danny", "sue","jane")

On Thu, Jul 2, 2009 at 11:13 AM, Neil Tiffin <neilt@neiltiffin.com> wrote:

> As an R beginner, I feel brain dead today as I can not find the answer to a
> relatively simple question.
>
> Given a array of string values, for example lets say "mary", "bob",
> "danny", "sue", and "jane".
>
> I am trying to determine how to perform a logical test to determine if a
> variable is an exact match for one of the string values in the array when
> the number of strings in the array is variable and without using a for loop
> and without comparing each value.  Considering the power of R, I thought
> this would be easy, but its not obvious to me.
>
> Now I may not yet be one with the R fu so a bit more context.
>
> I have a data frame that contains a column with text values. What I am
> trying to do is use the subset function on the data frame to select only
> data for "sue" or "jane" (for example.)  But maybe I have not taken the
> correct approach?
>
> So obviously I could do something like the following.
>
> subset( data_frame, name = "sue" | name == "jane", select = c(name, age,
> birthdate))
>
> However, my subset needs to be much more than 2 and being lazy I do not
> want to type "| name == "some text" for each one.
>
> Is there an other way?
>
> Neil
>
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>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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