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StreamPlot field lines

• To: mathgroup at smc.vnet.net
• Subject: [mg127518] StreamPlot field lines
• From: "Mat' G\." <ellocomateo at free.fr>
• Date: Wed, 1 Aug 2012 04:54:49 -0400 (EDT)
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Hello,
I use StreamPlot in Mathematica v8 to plot electric field lines from two 
functions: the x-component Ex[x_,y_] and the y-component Ey[x_,y_], each 
computed from a charge distribution.
Is it possible to force Mathematica to plot field lines fully extending 
from one charge to the other, as in 
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/imgele/edip2.gif?
So far I only get field lines homogeneously spatially distributed, but I 
would like to illustrate the field strength with the nb of lines (not 
with a density plot).
Thanks for reading!
Mat