<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<title></title>
</head>
<body text="#000000" bgcolor="#ffffff">
Dear All!<br>
<br>
Copy & Paste is a weird thing.<br>
<br>
Now it's working fine. <br>
<br>
Sorry for my stupid post. <br>
<br>
Thanks a lot to Herbert!<br>
<br>
Markus<br>
<br>
<br>
Am 13.04.2011 12:05, schrieb Herbert Voss:
<blockquote cite="mid:4DA57565.7010805@FU-Berlin.DE" type="cite">Am
13.04.2011 08:18, schrieb Markus Krebs:
<br>
<br>
<blockquote type="cite">It may be useful for teaching to have a
psNewton-macro
<br>
</blockquote>
<br>
Oh, there are a lot of useful things in the life :-)
<br>
<br>
With the pst-plot from
<br>
<a class="moz-txt-link-freetext" href="http://texnik.dante.de/tex/generic/pst-plot/">http://texnik.dante.de/tex/generic/pst-plot/</a>
<br>
you can use:
<br>
<br>
\documentclass{article}
<br>
\usepackage{pst-plot}
<br>
\begin{document}
<br>
<br>
\def\f{-(1/192)*x^3-(1/12)*x-(1/192)*Pi*x^2-(1/12)*Pi+2}
<br>
\def\fDerive{-(3/192)*x^2-(1/12)-(2/192)*Pi*x}
<br>
<br>
\psset{plotpoints=2000,unit=0.5,algebraic}
<br>
\begin{pspicture*}[showgrid](-20,-10)(8,20)
<br>
\psaxes[Dx=6,Dy=4]{->}(0,0)(-20,-10)(8,20)[$x$,270][$y$,0]
<br>
\psplot[algebraic,linewidth=2pt,linecolor=blue]{-20}{10}{\f}
<br>
\psxTick(-15){x_0}
<br>
\psNewton[linecolor=red,linewidth=0.5pt,showDerivation=false]{-15}{\f}{10}
<br>
%
<br>
%-15, -9.567466932, -4.903526029, 3.026073041, 6.688396612,
5.580230655 (Made by Maple)
<br>
\end{pspicture*}
<br>
<br>
\begin{pspicture*}[showgrid](-20,-10)(8,20)
<br>
\psaxes[Dx=6,Dy=4]{->}(0,0)(-20,-10)(8,20)[$x$,270][$y$,0]
<br>
\psplot[algebraic,linewidth=2pt,linecolor=blue]{-20}{10}{\f}
<br>
\psxTick(-15){x_0}
<br>
\psNewton[linecolor=red,linewidth=0.5pt,showpoints]{-15}{\f}[\fDerive]{10}
<br>
\end{pspicture*}
<br>
<br>
\end{document}
<br>
<br>
<br>
\psNewton{xStart}{Func}[f-Derivation]{steps}
<br>
<br>
Without the optional [f-Derivation] it uses an epsilon of 0.01
<br>
for the derivation
<br>
<br>
Herbert
<br>
<pre wrap="">
<fieldset class="mimeAttachmentHeader"></fieldset>
_______________________________________________
PSTricks mailing list
<a class="moz-txt-link-abbreviated" href="mailto:PSTricks@tug.org">PSTricks@tug.org</a>
<a class="moz-txt-link-freetext" href="http://tug.org/mailman/listinfo/pstricks">http://tug.org/mailman/listinfo/pstricks</a>
archive: <a class="moz-txt-link-freetext" href="http://www.tug.org/pipermail/pstricks/">http://www.tug.org/pipermail/pstricks/</a></pre>
</blockquote>
</body>
</html>