On Sun, May 6, 2012 at 10:20 PM, Linda Alvord <lindaalv...@verizon.net> wrote: > I found it confusing ...
Here's my perspective, I hope it helps. First, when dealing with shapes, I always like to start by working with i. $ i. 1 2 3 4 1 2 3 4 $ i. '' In general, $ will give you back something which is a suitable argument for i. which in turn will give you an array with the same shape. And, # can be defined in terms of $ hash=: '' $ $ , 1: Here, hash produces the same monadic result as # (# -: hash) '' 1 (# -: hash) i. 2 3 4 1 (# -: hash) i. 1 2 3 4 1 Finally, rank=: #@$ or rank=: '' $ [: $ $ Note that we do not need a 1: here because the monadic result of $ is always a list. FYI, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
