[Jprogramming] Complex Numbers

[Roger Hui]

Ken Iverson invented j. and IMO is a masterstroke which separates him from
mere mortals.  j. plays the same role for complex numbers as - for integers
and % for rational numbers.

See section 8 of *Some Exercises in APL Language Design
<http://www.jsoftware.com/papers/APLDesignExercises.htm>*.




On Mon, Jul 31, 2017 at 11:13 AM, Kenneth Lettow <klettow at thomasnet.com>
wrote:

> 1 j. %:3
>
> On Mon, Jul 31, 2017 at 2:10 PM, Skip Cave <skip at caveconsulting.com>
> wrote:
>
> > How can I create the complex number  1 i (sqrt 3)  in J
> >
> > Several tries didn't work:
> >
> >
> >
> >     1j%:3
> >
> > |ill-formed number
> >
> >     a =: %:3
> >
> >     1ja
> >
> > |ill-formed number
> >
> >     1j(%:3)
> >
> > |ill-formed number
> >
> >      %:3
> >
> > 1.73205
> >
> >     1j1.73205
> >
> > 1j1.73205      NB. This works, but it isn't very elegant.
> >
> >                     NB.  I have to copy/paste the square root as text.
> >
> >
> >
> >
> > Skip Cave
> > ----------------------------------------------------------------------
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> ----------------------------------------------------------------------
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