[R] Check for presence of object in group of objects

[Chuck Cleland]

Christoph Heibl wrote:
> Dear List,
> 
> must be simple, but i got stuck on this...
> 
> I´ve been trying around for some time, but I could not find a  
> straigthforward way to do this:
> How can one ask if a certain object is element of a certain group of  
> objects, e.g stored in a vector?
> 
> x <- c("a", "b", "c")
> # is there a simple function which returns:
> is "a" part of x?
> TRUE
> is "d" part of x?
> FALSE

x <- c("a", "b", "c")

"a" %in% x
[1] TRUE

"d" %in% x
[1] FALSE

?is.element

> Thanks a lot
> Christoph
> 
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-- 
Chuck Cleland, Ph.D.
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