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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /info/examples/PSTricks_en/27-02-38.ltx
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+%%
+%% A DANTE-Edition example
+%%
+%%
+%% Copyright (C) 2011 Herbert Voss
+%%
+%% It may be distributed and/or modified under the conditions
+%% of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%%
+%% See http://www.latex-project.org/lppl.txt for details.
+%%
+%%
+%% ====
+% Show page(s) 1
+%%
+\documentclass[]{article}
+\pagestyle{empty}
+\setlength\textwidth{201.70511pt}
+\setlength\parindent{0pt}
+
+\usepackage{pstricks-add,pst-func,multido}
+
+\begin{document}
+\begin{pspicture*}(-5,-2)(5.5,2)
+ \pscircle(0,0){1}\psaxes{->}(0,0)(-5,-1.5)(5.5,2)
+ \multido{\rA=0.01+0.2}{5}{%
+ \psplotImp[linewidth=1pt,linecolor=blue,polarplot](-6,-6)(5,2.4){
+ r dup mul 1.0 r div sub phi sin dup mul mul \rA\space sub }}
+ \rput[lb](0.5,1.3){$f(r,\phi)=\left(r^2-\frac{1}{r}\right)\times\sin^2\phi=0$}
+\end{pspicture*}
+\end{document}