[Jprogramming] Challenge 8 A Shamrock for St. Patrick

[chris burke]

See: http://www.jsoftware.com/jwiki/Plot/Class

On Thu, Mar 22, 2012 at 7:49 AM, Linda Alvord <lindaalvord at verizon.net>wrote:

> Copy the expression below into  ijix  and run display.  A lovely graph of a
> trifolium appears.  It seems that it is arriving by mental telepathy.
>  There
> is no sign of  'radar' anyhere.  Use  load 'plot'  and there is no sign of
> 'radar'.  It is not in names_j_  or  names_z_  .  So where and what is it?
>
> -----Original Message-----
> From: programming-bounces at jsoftware.com
> [mailto:programming-bounces at jsoftware.com] On Behalf Of Henry Rich
> Sent: Wednesday, March 21, 2012 7:29 AM
> To: Programming forum
> Subject: Re: [Jprogramming] Challenge 8 A Shamrock for St. Patrick
>
> Cute!  J version:
>
> 'radar' plot 0 2p1;'1 + (cos 3*y) + *: sin 3*y'
>
> Henry Rich
>
> On 3/21/2012 5:55 AM, Boyko Bantchev wrote:
> > FWIW, the cleanest mathematical / programmable trefoil that I know of
> > is the following (I am too lazy to do it in J, so Gnuplot):
> >
> > set size ratio 1.08
> > set parametric
> > set polar
> > plot [0:2*pi] t,1+cos(3*t)+sin(3*t)**2
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> >
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