Hi, @Erling
It seems <;.1^:_1 was dropped a while back. See http://code.jsoftware.com/wiki/System/Interpreter/Requests#reinstate_.3C.3B.1.5E:_1 On Sun, Oct 15, 2017 at 4:15 PM, Henry Rich <[email protected]> wrote: > Another idea is > > kr2 =: *&$ ($,) *"0 1"1"1 2 > > which is not as beautiful but could, in theory, do less work since the > reshape could be done in-place (not supported yet, but will be someday) > > Henry Rich > > > On 10/15/2017 3:08 PM, Cliff Reiter wrote: > >> I think kr=: [: ,./^:2 */ is what (or close to it) we came up with then. >> My retest 18 years later wasn't so good :). >> kr=:[:,./ [: ,/"_1 */ >> I like the expressiveness of Roger's *"0 2 >> Thanks for the interesting ideas and solutions. Cheers, Cliff >> >> On 10/14/2017 12:36 PM, Roger Hui wrote: >> >>> http://code.jsoftware.com/wiki/Essays/Kronecker_Product >>> >>> Victor Cerovski had the [: ,./^:2 */ expression in 2010-02-26 >>> >>> >>> >>> On Sat, Oct 14, 2017 at 9:30 AM, robert therriault < >>> [email protected]> >>> wrote: >>> >>> Slight variation to Roger (talk about standing on the shoulders of >>>> giants!) >>>> >>>> kr=: [: ,./^:2 */ >>>> a kr b >>>> 2 2 2 3 3 3 >>>> 2 4 2 3 6 3 >>>> 2 2 2 3 3 3 >>>> 5 5 5 7 7 7 >>>> 5 10 5 7 14 7 >>>> 5 5 5 7 7 7 >>>> >>>> Cheers, bob >>>> >>>>> On Oct 14, 2017, at 9:10 AM, Roger Hui <[email protected]> >>>>> >>>> wrote: >>>> >>>>> kr=: [: ,./^:2 *"0 2 >>>>> >>>>> a kr b >>>>> 2 2 2 3 3 3 >>>>> 2 4 2 3 6 3 >>>>> 2 2 2 3 3 3 >>>>> 5 5 5 7 7 7 >>>>> 5 10 5 7 14 7 >>>>> 5 5 5 7 7 7 >>>>> >>>> ---------------------------------------------------------------------- >>>> 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 >> > > > --- > This email has been checked for viruses by AVG. > http://www.avg.com > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
