Chris, The wiki page didn't solve the mystery of 'radar'
load 'plot'
T=:2p1
d=: 13 :'(0{x)-(-/x)*(i.y)%<:y' NB. domain intervals
tf=:1 o. 3*y
plot 1 o. tf
'radar' plot tf
The lines above follow the suggestion of Henry Rich and work like a charm,
but how does 'radar' do its magic?
When I tried the suggestions in the wiki page, here's what happened.
load 'jzplot'
c=: conew 'jzplot'
plot__c tf
plot__c 'radar' tf
|option not found: radar: signal
| signal'option not found: ',j
The polar graph of the trifolium fails.
Linda
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of chris burke
Sent: Wednesday, March 21, 2012 8:45 PM
To: Programming forum
Subject: Re: [Jprogramming] Challenge 8 A Shamrock for St. Patrick
See: http://www.jsoftware.com/jwiki/Plot/Class
On Thu, Mar 22, 2012 at 7:49 AM, Linda Alvord
<[email protected]>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: [email protected]
> [mailto:[email protected]] 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
> > --------------------------------------------------------------------
> > -- 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
>
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