<font color='black' size='2' face='Arial, Helvetica, sans-serif'>Oops! Sorry. Here is the real example!<font color="black" face="Arial, Helvetica, sans-serif" size="2"><br>
<br>
\documentclass{article}<br>
\usepackage{pstricks-add,pst-func}<br>
<br>
\def\vXvY{(v0*((y[1])^4)-wR*(Ra^2)*((y[1])^3)+2*v0*(y[0]^2)*((y[1])^2)+((y[1])^2)*v0*((Ra)^2)-wR*(Ra^2)*(y[0]^2)*(y[1])+v0*(y[0]^4)-v0*(Ra^2)*(y[0]^2))/((y[0]^2+y[1]^2)^2)<br>
|<br>
(y[0]*(Ra^2)*(wR*((y[1])^2)-2*v0*(y[1])+wR*(y[0]^2)))/((y[0]^2+y[1]^2)^2)}<br>
<br>
\begin{document}<br>
\begin{center}<br>
\begin{pspicture}(-8,-6)(8,6)%<br>
\psgrid%<br>
\psframe*[linecolor=gray!30](-8,-6)(8,6)%<br>
\pstVerb{%<br>
/v0 1 def % vitesse a l'infini m/s<br>
/Ra 1 def % rayon du cylindre<br>
/wR 2.25 def % vitesse de rotation du cylindre rd/s<br>
}%<br>
\pscircle{!Ra}<br>
\BeginSaveFinalState%<br>
\multido{\ry=-4+0.5,\i=0+1}{22}{%<br>
\psplotDiffEqn[%<br>
    linecolor=red,%<br>
    method=rk4,%<br>
    algebraic,%<br>
    plotpoints=1000,%<br>
    saveData=true,%<br>
    filename=PSTdata\i,%<br>
    whichabs=0, whichord=1]{-8}{35}{-8 \ry}{\vXvY}%<br>
}%<br>
\EndSaveFinalState%<br>
\pscircle[fillstyle=solid,fillcolor=gray,linecolor=red]{!Ra}<br>
\psarc{->}(0,0){0.75}{240}{300}<br>
\psgrid%<br>
\end{pspicture}<br>
\end{center}<br>
\end{document}<br>
<br>
Manuel<br>


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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----E-mail d'origine-----<br>

De : Manuel Luque <mluque5130@aol.com><br>

A : pstricks <pstricks@tug.org><br>

Envoyé le : Samedi, 28 Mai 2011 20:03<br>

Sujet : [pstricks] Problems with "saveData" in "\psplotDiffEqn"<br>

<br>









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<div> Hello,<br>


<br>


When we use the option "saveData=true" of the macro "\psplotDiffEqn" (package "pstricks-add") in a loop, it arises two strange behaviors:<br>


-  a systematic horizontal shift of the  curves.<br>


-  a downscaling  of the grid ("psgrid") and objects.<br>


<br>


Did you know these problems? Do you have a solution? <br>


<br>


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br>


<br>


\documentclass{article}<br>


\usepackage{pstricks-add,pst-func}<br>


<br>


\def\vXvY{(v0*((y[1])^4)-wR*(Ra^2)*((y[1])^3)+2*v0*(y[0]^2)*((y[1])^2)+((y[1])^2)*v0*((Ra)^2)-wR*(Ra^2)*(y[0]^2)*(y[1])+v0*(y[0]^4)-v0*(Ra^2)*(y[0]^2))/((y[0]^2+y[1]^2)^2)<br>


|<br>


(y[0]*(Ra^2)*(wR*((y[1])^2)-2*v0*(y[1])+wR*(y[0]^2)))/((y[0]^2+y[1]^2)^2)}<br>


<br>


\begin{document}<br>


\begin{center}<br>


\begin{pspicture}(-8,-6)(8,6)%<br>


\psgrid%<br>


\psframe*[linecolor=gray!30](-8,-6)(8,6)%<br>


\pstVerb{%<br>


/v0 1 def % vitesse a l'infini m/s<br>


/Ra 1 def % rayon du cylindre<br>


/wR 2.25 def % vitesse de rotation du cylindre rd/s<br>


}%<br>


\pscircle{!Ra}<br>


\BeginSaveFinalState%<br>


\multido{\ry=-4+0.5}{22}{%<br>


\psplotDiffEqn[%<br>


    linecolor=red,%<br>


    method=rk4,%<br>


    algebraic,%<br>


    plotpoints=1000,%<br>


    saveData=true,%<br>


    filename=PSTdata\i,%<br>


    whichabs=0, whichord=1]{-8}{35}{-8 \ry}{\vXvY}%<br>


}%<br>


\EndSaveFinalState%<br>


\pscircle[fillstyle=solid,fillcolor=gray,linecolor=red]{!Ra}<br>


\psarc{->}(0,0){0.75}{240}{300}<br>


\psgrid%<br>


\end{pspicture}<br>


\end{center}<br>


\end{document}<br>


<br>


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%<br>


<br>


Thanks,<br>


<br>


Manuel<br>



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