Yes, but p: inv has a long and honorable history as the "pi" function in mathematics.
----- Original Message ----- From: Raul Miller <[email protected]> Date: Tuesday, September 7, 2010 11:26 Subject: Re: [Jprogramming] Mask from list of indices with multiplicity To: Programming forum <[email protected]> > On Mon, Sep 6, 2010 at 2:25 AM, Roger Hui <[email protected]> wrote: > > I.^:_1 seems too far from what <:#/.~universe,x does. > > Another way to say that is that I. I.^:_1 x can bear > > scant resemblance to x . > > p: p:inv i.10 > 2 2 2 3 5 5 7 7 11 11 > > Nevertheless, both p: and p:inv are useful. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
