I've done: verb&,\ I arranged the list to be of shape 'x 4'. This seems to work. The problem I'm now having is that my verb is slow. Can this be refined (significantly)?
+/@:(1&p:) % 1&+@:# It takes finds the percentage of items in the list which are prime. On 25 Sep 2011, at 20:04, Don Guinn wrote: > verb=.< > (verb&,)\_4,\3 5 7 9 13 17 21 25 31 37 43 49 > +-------+-------------------+-------------------------------+ > |3 5 7 9|3 5 7 9 13 17 21 25|3 5 7 9 13 17 21 25 31 37 43 49| > +-------+-------------------+-------------------------------+ > > > On Sun, Sep 25, 2011 at 12:44 PM, David Vaughan < > [email protected]> wrote: > >> I'm trying to apply a verb to infixes of length 4 but I want it to be >> cumulative. i.e. in the list: >> >> 3 5 7 9 13 17 21 25 31 37 43 49 >> >> I want: >> >> verb 3 5 7 9 >> verb 3 5 7 9 13 17 21 25 >> verb 3 5 7 9 13 17 21 25 31 37 43 49 >> >> Any help? Thanks. >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
