Hello all, To my mind, comfort with indexing is one of the differentiating factors for array programming vs. functional programming; J has grade as a primitive on par with sort.
NuVoc lists /:@/: (rank) and permutation inversion as two uses. Are there any examples you like that show off grade or perhaps indexing ({)? Cheers, Vanessa McHale ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm