pydata/pandas — pull request #5875 by chappers (2014-01-08 09:21:06+00:00)
Title: DOC: Add %in% operator into compare w r (GH3850)

Doesn't close #3850 but at least the `%in%` operator is now in the comparison with R docs. I've lumped it with the `match` function since thats the page you see the `%in%` operator in the R docs .