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
Thanks a lot
Christoph
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