pdl> ?? maximum_n_ind
maximum_n_ind   P::Ufunc  Returns the index of `m_size' maximum elements. As of
                          2.077, you can specify how many by either passing in
                          an ndarray of the given size (DEPRECATED - will be
                          converted to indx if needed and the input arg will be
                          set to that), or just the size, or a null and the
                          size.
maxover_n_ind   P::Ufunc  Synonym for maximum_n_ind.