Thanks Raul, I'd actually come across it (f.) before, but had completely forgotten. So much to remember... or I'm getting old :)
On Fri, 2010-11-19 at 16:07 -0500, Raul Miller wrote: > On Fri, Nov 19, 2010 at 3:53 PM, Alex Gian <[email protected]> wrote: > > sincos =. (1&o. * 2&o.) > > sincos d. 1 > > sincos d.1 NB. Hm.... > > > > What can I do to the "sincos" verb so that it is presented to the d. > > adverb in terms of its primitives so that the differentiation can take > > place? > > sincos =. 1&o. * 2&o. > sincos f. d. 1 > (2&o. * 2&o.) + 1&o. * -@(1&o.) > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
