Here is small tweak that seems to make a big difference to both the memory consumed and performance:
From this: ed=: 4 : 0 row=. 4 : '+/ *: (x - (|: y))' > (row & y) each < "1 x ) to this: ed=: 4 : 0 NB. Euclidean distance row=. +/ @: *: @: (- & (|: y)) > row each < "1 x ) The row function is here tacified so that I could implicitly use the data passed in the variable y without having to pass it into each call. Doing this seems to use about 1/4 less memory, reduces compute time by almost a half. No idea why. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
