Yes - I don't see how either. In any case, I fixed it by changing the
lovely, simple "(+*:)" to a "capped" version: 2&((2j2,~]){~[<[:|])@:(+*:)"0).
So, anyone who's interested in this should try
{&'#.'@(2:<|)@((2&((2j2 ,~ ]) {~ [ < [: |
])@:(+*:)"0)^:30~)(24%~i:_24)j.~/36%~_72+i.88
or, even better, this
load 'viewmat'
viewmat ((2&((2j2 ,~ ]) {~ [ < [: |
])@:(+*:)"0)^:20~)(512%~i:_512)j.~/419%~_825+i.1024
On Fri, Oct 31, 2014 at 12:24 PM, Joe Bogner <[email protected]> wrote:
> I may be stating the obvious, but it looks like the numbers are
> doubling per iteration
>
> {. 0 {"1 ((+*:)^:8~)(12%~i:_12)j.~/18%~_36+i.44
> 4.41152e66j_1.05844e67
>
> {. 0 {"1 ((+*:)^:9~)(12%~i:_12)j.~/18%~_36+i.44
> _9.25685e133j_9.33868e133
>
> {. 0 {"1 ((+*:)^:10~)(12%~i:_12)j.~/18%~_36+i.44
> _1.52155e266j1.72894e268
>
> It overflows at 11
>
> I don't see how it could have worked with the same inputs above 10 before
>
> On Fri, Oct 31, 2014 at 11:54 AM, Aai <[email protected]> wrote:
> > Lowering the iteration to 11 gives me a result.
> >
> > Devon McCormick schreef op 31-10-14 om 16:49:
> >
> >> I don't know when it worked or on what version - I just have a snippet
> in
> >> a
> >> file.
> >>
> >> On Fri, Oct 31, 2014 at 10:51 AM, Joe Bogner <[email protected]>
> wrote:
> >>
> >>> Hi Devon - any idea what version / platform it worked on? I tried
> >>> j6.02 and j8.01 32bit along with j8.03 64 bit and all reported the
> >>> same
> >>>
> >>>
> >>>
> >>> On Fri, Oct 31, 2014 at 10:26 AM, Devon McCormick <[email protected]>
> >>> wrote:
> >>>>
> >>>> Hi -
> >>>>
> >>>> I think that this expression
> >>>>
> >>>> {&'#.'@(2:<|)@((+*:)^:250~)(12%~i:_12)j.~/18%~_36+i.44
> >>>>
> >>>> used to work but now fails with "NaN error" if the value of the power
> >>>> iteration, shown as 250 here, is any greater than 10 or 11.
> >>>>
> >>>> Is anyone familiar with this? Any idea why it used to work but now
> >>>
> >>> fails?
> >>>>
> >>>> Any idea on how to get it to work with more than 10 iterations?
> >>>>
> >>>> It's potentially a nice illustration of the power of J - or of the
> power
> >>>
> >>> of
> >>>>
> >>>> "power".
> >>>>
> >>>> --
> >>>> Devon McCormick, CFA
> >>>> ----------------------------------------------------------------------
> >>>> For information about J forums see
> http://www.jsoftware.com/forums.htm
> >>>
> >>> ----------------------------------------------------------------------
> >>> For information about J forums see http://www.jsoftware.com/forums.htm
> >>>
> >>
> >>
> >
> > --
> > Met vriendelijke groet,
> > @@i = Arie Groeneveld
> >
> >
> > ----------------------------------------------------------------------
> > For information about J forums see http://www.jsoftware.com/forums.htm
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>
--
Devon McCormick, CFA
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
