Here's a problem that shows up in J 6.02 but not J 7.01. I'm not sure if it will ever be fixed for J 6.
]&(%0 1,:1 0) |NaN error but ]&(%0 1,:1 0) 0 _ 1 1 _ That said, note also that it's quirky to reproduce under J 6.02 (the shape of the array seems to matter). I'm using the 64 bit version if that matters. 9!:14'' j602/2008-03-03/16:45 -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
