ŒỤ - Multidimensional Grade Up
Tags: miscellaneous , array , number , combinatorics
This atom is monadic, which means it takes one argument.
Grade up a multidimensional list; that is, sort its multidimensional indices by the corresponding values.
Indexing the graded list into the list (
ŒỤœị$) sorts the list (equivalent to
FṢ$). You can negate the values before grading to grade down (