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Groups > comp.graphics.apps.gnuplot > #1062
| From | "Charles T. Smith" <cts.private@yahoo.com> |
|---|---|
| Newsgroups | comp.graphics.apps.gnuplot |
| Subject | Re: fatal precision problem in gnuplot or fatal operator incompetence? |
| Date | 2012-04-28 16:45 +0200 |
| Organization | 1&1 Internet AG |
| Message-ID | <jngvrd$6qj$2@online.de> (permalink) |
| References | <jnggj3$s2a$1@online.de> <jngkj2$umr$1@online.de> <87haw4lydm.fsf@wivenhoe.ul.ie> |
On 04/28/12 16:33, Brendan Halpin wrote: > 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 > Thank you for the complete and concise answers.
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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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