[pstricks] Re : Re : about pst-electricfield

[Manuel Luque]

Dear Kari,

The result is perfect. Effectively, the parameter "N" (the number of  field lines) can be used to obtain the best symmetry.


Best wishes
 
manuel

 


 

 

-----E-mail d'origine-----
De : Kari Eloranta <kari.eloranta at me.com>
A : pstricks at tug.org
Envoyé le : Dimanche, 20 Février 2011 7:34
Sujet : [pstricks] Re : about pst-electricfield


Dear Manuel,
Thank you very, very much. I was only hoping my problem would be solved. I am writing material for my students, and now I am able to send them the text tomorrow. What a beautiful way to start a sunny Sunday morning :-)
I modified the suggested code a bit to maintain symmetry (changed 16 to 15 in \psElectricfield).
 
\begin{center}

\begin{pspicture*}(-4,-4)(4,4)

 \psframe*[linecolor=green!20](-4,-4)(4,4)

 \psgrid[subgriddiv=0,gridcolor=lightgray,griddots=10]

\rput{90}(0,0){\psElectricfield[Q={[2 0 2 15][2 0 -2 15]}]}

 \rput[0](-2,0){\large{$+$}}

 \rput[0](2,0){\large{$+$}}

\end{pspicture*}

\end{center}
Best regards,
 Kari



Dear Kari,



Try with this code :



\documentclass{article}

\usepackage{pst-electricfield}

\begin{document}

\begin{center}

\begin{pspicture*}(-4,-4)(4,4)

 \psframe*[linecolor=green!20](-4,-4)(4,4)

 \psgrid[subgriddiv=0,gridcolor=lightgray,griddots=10]

\rput{90}(0,0){\psElectricfield[Q={[2 0 2 16][2 0 -2 16]}]}

 \rput[0](-2,0){\large{$+$}}

 \rput[0](2,0){\large{$+$}}

\end{pspicture*}

\end{center}

\end{document} 





 Best regards,

 



M.L.



 





 



 



-----E-mail d'origine-----

De : Kari Eloranta <kari.eloranta at me.com>

A : pstricks at tug.org

Envoyé le : Samedi, 19 Février 2011 15:25

Sujet : [pstricks] about pst-electricfield









I have used the pst-electricfield package to draw the field of two positive point charges. However, the code below produces

a line connecting the two charges. I do not think that it should be like that, but more like in http://dev.physicslab.org/Document.aspx?doctype=3&filename=Electrostatics_PointChargesElectricFields.xml.





Am I mistaken? If I am not, is there a way of correcting it?





Best regards,

  Kari









\begin{center}

\begin{pspicture*}(-4,-3)(4,3)

 \psframe*[linecolor=green!20](-4,-3)(4,3)

 \psgrid[subgriddiv=0,gridcolor=lightgray,griddots=10]

 \psElectricfield[Q={[2 -2 0][2 2 0]}]

 \rput[0](-2,0){\large{$+$}} \rput[0](2,0){\large{$+$}}

\end{pspicture*}\label{fig:twoEqPointCharges}\caption{The electric field of two equal positive point charges.}

\end{center}





***************************************

Kari Eloranta

Ketunpolku 1

40400 Jyväskylä

Puh: +358 40 586 7654






***************************************
Kari Eloranta
Ketunpolku 1
40400 Jyväskylä
Puh: +358 40 586 7654









=
 
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