Need free program to plot expressions in polar coordinates

AI Thread Summary
A user is seeking a free program to plot expressions in polar coordinates, specifically for visualizing equipotentials of a dipole charge configuration. The relevant potential equation is provided, detailing the relationship between charge and distance. Recommendations for suitable software include Octave and SciPy/matplotlib, which are noted for their plotting capabilities. Additionally, GNUPlot is suggested as another option for this task. The discussion highlights the importance of finding accessible tools for visualizing complex mathematical expressions.
morangta
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Homework Statement


Need a free program to plot expressions in polar coordinates. For example, I want to plot the equipotentials for an expression in polar coordinates of the potential for a dipole charge, 4q and -q separated by a distance L.


Homework Equations


V=kq(4/r1 - 1/r), where r12 = r2+ L2 - 2rLcosθ.


The Attempt at a Solution


Octave and SciPy/matplotlib are posted online as two (2) good programs.


PS Thank you to Simon for guiding me to a solution for the sheet charge electric field problem I posted.
 
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You could try GNUPlot.
 
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