This line really doesn't make much sense in the first place. Imagine a user from Matlab reading this doc-string. How is that user supposed to understand what the second sentence have anything to do with returning the argument of the minimum value (if he doesn't know what np.intp is)? Also, is the behavior the same if I pass in empty arrays compared to passing in an all-nan array? Maybe a few more examples clarifying the edge cases would be prudent.