(Correct the title) Sent from my iPad
On Nov 16, 2012, at 3:38 PM, km <[email protected]> wrote: > Here is my attempt to explain the difference between conjunctions @: and @ > > ]A =: 2 3 $ 1 2 3 4 5 6 > 1 2 3 > 4 5 6 > |. A NB. Reverse matrix A > 4 5 6 > 1 2 3 > |."1 A NB. Reverse each row of A (each 1-cell) > 3 2 1 > 6 5 4 > |. @: (|."1) A NB. Reverse the result of |."1 A > 6 5 4 > 3 2 1 > |. @ (|."1) A NB. Reverse each reversed row of A > 1 2 3 > 4 5 6 > > In general, f @: (g"r) y means apply f to the result of g"r y and f @ (g"r) y > means apply f separately to the results of applying g to each r-cell of y. > When r is not specified, the right rank of g is used. > > You may be able to guess from this what happens when f @: g and f @ g are > used dyadically! > > Kip Murray > > Sent from my iPad > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
