[R] exact string match?

bamsel benamsel at gmail.com
Fri Oct 30 22:00:04 CET 2009

Dear R users:
I need to compare character strings stored in 2 separate data frames. I need
an exact match, so finding "a" in "animal" is no good. 
I've tried regexpr, match, and grepl, but to no avail. 
Anybody know how to accomplish this?
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