--- /dev/null
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -*- Mode: Latex -*- %%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% pst-eqdf.tex --- plotting of differential equations
+%% Copyright 2004 Dominique RODRIGUEZ
+%%
+%% Author : Dominique RODRIGUEZ (EN) <dominique.rodriguez@waika9.com>
+%% Created the : ven avr 2 22:02:01 CEST 2004
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% HISTORY
+%%
+%% 2004-04-04 : creation of the file from a first LaTeX protype sty file
+%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\def\fileversion{pre-1.0}
+\def\filedate{2004/03/21}%
+%% This program can be redistributed and/or modified under the terms
+%% of the LaTeX Project Public License Distributed from CTAN
+%% archives in directory macros/latex/base/lppl.txt.
+%% adapation de M.Luque juin 2012 pour
+%% sauvegarde de tableaux de valeurs
+\message{`PST-Equadiff v\fileversion, \filedate\space (Dominique RODRIGUEZ)}%
+\csname PSTEquadiffLoaded\endcsname
+\let\PSTEquadiffLoaded\endinput
+% Require PSTricks and pst-node packages
+\ifx\PSTricksLoaded\endinput\else \input pstricks \fi
+\ifx\PSTplotLoaded\endinput\else \input pst-plot.tex\fi
+\ifx\PSTXKeyLoaded\endinput\else \input pst-xkey.tex \fi
+\edef\PstAtCode{\the\catcode`\@}%
+\catcode`\@=11\relax
+% Definition of the parameters
+% ----------------------------
+\pst@addfams{pst-eqd}
+\define@key[psset]{pst-eqd}{method}{\edef\psk@method{#1}}%
+\define@key[psset]{pst-eqd}{whichabs}{\edef\psk@whichabs{#1}}%
+\define@key[psset]{pst-eqd}{whichord}{\edef\psk@whichord{#1}}%
+\define@key[psset]{pst-eqd}{plotfuncx}{\edef\psk@plotfuncx{#1}}%
+\define@key[psset]{pst-eqd}{plotfuncy}{\edef\psk@plotfuncy{#1}}%
+\define@key[psset]{pst-eqd}{tabname}{\edef\psk@tabname{#1}}%
+\define@key[psset]{pst-eqd}{filename}{\edef\psk@filename{#1}}%
+\newif\ifPst@buildvector%
+\define@key[psset]{pst-eqd}{buildvector}[true]{\@nameuse{Pst@buildvector#1}}%
+\newif\ifPst@saveData%
+\define@key[psset]{pst-eqd}{saveData}[true]{\@nameuse{Pst@saveData#1}}%
+\psset[pst-eqd]{method=default, whichabs={}, whichord={}, filename=datas.dat,
+ plotfuncx={}, plotfuncy={}, buildvector=false, tabname=tabValues, saveData=false}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\SpecialCoor%% for using polar coordinates, node position, ...
+\psset{dimen=middle}%
+\def\@undef{undef}%
+\def\@default{default}%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% #1-#2 x range
+%% #3 initial value of y (which is a vector)
+%% #4 value of the dérivative (y and t can be used)
+\def\psequadiff{\def\pst@par{}\pst@object{psequadiff}}
+\def\psequadiff@i#1#2#3#4{%
+ \pst@killglue
+ \begingroup
+ \use@par
+% \addto@pscode{%
+\pstVerb{
+ /x #1 def
+ /x1 #2 def
+ /y [ #3 ] def
+ /ylength y length def
+ /addvect
+ { /len exch def 1 1 len
+ { /i exch def len i sub 2 add -1 roll add len 2 mul i sub 1 roll } for } def
+ /dx x1 x sub \psk@plotpoints div def
+ /mulvect { exch 1 index { dup 4 -1 roll mul 2 index 2 add 1 roll } repeat pop pop } def
+ /divvect { exch 1 index { dup 4 -1 roll exch div 2 index 2 add 1 roll } repeat pop pop } def
+ /k0 0 def /k1 0 def /k2 0 def /k3 0 def
+ \ifPst@algebraic /F@pstplot (#4) AlgParser cvx def \fi
+ /Func {
+ \ifPst@algebraic F@pstplot ylength array astore
+ \else
+ \ifPst@buildvector\else y aload pop \fi #4
+ \ifPst@buildvector\else ylength array astore \fi
+ \fi
+ } def
+ /xy {
+ \ifx\psk@method\@default%
+ \ifx\psk@plotfuncx\@empty
+ \ifx\psk@whichabs\@empty x \else y \psk@whichabs\space get \fi%
+ \else\psk@plotfuncx\space\fi%
+% \pst@number\psxunit mul
+ y /y Func { dx mul } forall y aload pop ylength addvect ylength array astore def
+ \ifx\psk@plotfuncy\@empty
+ \ifx\psk@whichord\@empty 0 \else\psk@whichord\space\fi get %
+ \else\psk@plotfuncy\space\fi
+ \else%
+ \ifx\psk@plotfuncx\@empty
+ \ifx\psk@whichabs\@empty x \else y \psk@whichabs\space get \fi%
+ \else\psk@plotfuncx\space\space\fi%
+ y /k0 Func { dx mul } forall ylength array astore def %% y
+ dup aload pop k0 { 2 div } forall ylength addvect ylength array astore /y exch def %
+ x dup dx 2 div add /x exch def %% y x
+ /k1 Func { dx mul } forall ylength array astore def %% y x
+ exch dup aload pop k1 { 2 div } forall ylength addvect y astore pop %% x y
+ /k2 Func { dx mul } forall ylength array astore def %% x y
+ dup aload pop k2 aload pop ylength addvect y astore pop exch dup dx add /x exch def %% y x
+ /k3 Func { dx mul } forall ylength array astore def %% y x
+ /x exch def %% y
+ dup aload pop k0 aload pop k1 aload pop k2 aload pop ylength addvect
+ 2 ylength mulvect ylength addvect k3 aload pop ylength addvect
+ 6 ylength divvect ylength addvect y astore pop
+ \ifx\psk@plotfuncy\@empty
+ \ifx\psk@whichord\@empty 0 \else\psk@whichord\space\fi get %
+ \else\psk@plotfuncy\space\fi
+ \fi
+ } def
+/\psk@tabname[
+ \psk@plotpoints {
+ xy
+ /x x dx add
+ def
+ } repeat
+ /x x1 def
+ xy
+ ] def
+\ifPst@saveData
+/fichierpoints (\psk@filename) (w) file def
+0 2 \psk@tabname\space length 2 sub {/i exch def
+ /xi \psk@tabname\space i get def
+ /yi \psk@tabname\space i 1 add get def
+ fichierpoints xi 15 string cvs writestring
+ fichierpoints 32 write %% espace
+ fichierpoints yi 15 string cvs writestring
+ fichierpoints 32 write %% espace
+ fichierpoints 10 write %% CR
+} for
+fichierpoints closefile
+\fi
+ }%
+ \endgroup
+ \ignorespaces}
+%%% Local Variables:
+%%% mode: latex
+%%% TeX-master: t
+%%% End:
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