Path: csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder1.enfer-du-nord.net!news.cgarbs.de!news.addix.net!feed.news.schlund.de!schlund.de!news.online.de!not-for-mail From: 3031-866 Newsgroups: comp.graphics.apps.gnuplot Subject: Re: fatal precision problem in gnuplot or fatal operator incompetence? Date: Sat, 28 Apr 2012 13:33:44 +0200 Organization: 1&1 Internet AG Lines: 23 Message-ID: References: NNTP-Posting-Host: p5b07837f.dip0.t-ipconnect.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: online.de 1335612834 31451 91.7.131.127 (28 Apr 2012 11:33:54 GMT) X-Complaints-To: abuse@einsundeins.com NNTP-Posting-Date: Sat, 28 Apr 2012 11:33:54 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux i686; rv:10.0) Gecko/20120129 Thunderbird/10.0 In-Reply-To: Xref: csiph.com comp.graphics.apps.gnuplot:1058 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? Is this a reason to be using 64 bit linux?