Is there a shorter sentence? [: |: [: (i. >./)"1 |: I'm thinking this could work: i."SOME RANK >./
]a=: (?.@$ */)2 3 6 NB. data, rank 3 18 20 28 30 29 28 22 28 8 7 21 32 31 17 25 32 33 28 13 17 29 15 1 25 18 28 33 26 22 9 17 6 34 15 23 35 >./a NB. want the index of a plane having these maximums 18 20 29 30 29 28 22 28 33 26 22 32 31 17 34 32 33 35 NB. this works but involves two transposes |: (i. >./)"1 |: a 0 0 1 0 0 0 0 0 1 1 1 0 0 0 1 0 0 1 NB. this version is ridiculous <./ (<:@+ >:@# * 0 = ]) (>:@i.@# * (="2 >./)) a 0 0 1 0 0 0 0 0 1 1 1 0 0 0 1 0 0 1 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
