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Re: fatal precision problem in gnuplot or fatal operator incompetence?

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From	brendan.halpin@ul.ie (Brendan Halpin)
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: fatal precision problem in gnuplot or fatal operator incompetence?
Date	Sat, 28 Apr 2012 15:33:25 +0100
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On Sat, Apr 28 2012, 3031-866 wrote:

> On 04/28/12 12:25, Charles T. Smith wrote:
>> Why does:
>>
>> plot [0:1000] sin(x)
>>
>> seem to be modulated with what appears to be a sine wave?
>
>
> Could this have anything to do with the fact that when I plot:
>
>
> gnuplot> set parametric
> gnuplot> set size square
> gnuplot> r(t) = 1 - exp(-0.25*t/pi)   # the radius as function of t
> gnuplot> plot [0:25*pi][-1.1:1.1][-1.1:1.1] r(t)*cos(t), r(t)*sin(t)
>
> (from Gnuplot In Action, by Philipp K. Janert)
>
> I get a spiral of straight lines rather than a curving spiral, as shown
> in the book?

Yes, exactly so. Insert "set samples 10000" and you'll get your spiral.

>
> Is this a reason to be using 64 bit linux?

No. 

Brendan

-- 
Brendan Halpin,   Department of Sociology,   University of Limerick,   Ireland
Tel: w +353-61-213147  f +353-61-202569  h +353-61-338562;  Room F1-009 x 3147
mailto:brendan.halpin@ul.ie    ULSociology on Facebook: http://on.fb.me/fjIK9t
http://teaching.sociology.ul.ie/bhalpin/wordpress         twitter:@ULSociology

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fatal precision problem in gnuplot or fatal operator incompetence? "Charles T. Smith" <cts.private@yahoo.com> - 2012-04-28 12:25 +0200
  Re: fatal precision problem in gnuplot or fatal operator incompetence? 3031-866 <cts.private@yahoo.com> - 2012-04-28 13:33 +0200
    Re: fatal precision problem in gnuplot or fatal operator incompetence? brendan.halpin@ul.ie (Brendan Halpin) - 2012-04-28 15:33 +0100
      Re: fatal precision problem in gnuplot or fatal operator incompetence? "Charles T. Smith" <cts.private@yahoo.com> - 2012-04-28 16:45 +0200
  Re: fatal precision problem in gnuplot or fatal operator incompetence? brendan.halpin@ul.ie (Brendan Halpin) - 2012-04-28 15:31 +0100
    Re: fatal precision problem in gnuplot or fatal operator incompetence? "Charles T. Smith" <cts.private@yahoo.com> - 2012-04-28 16:43 +0200

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