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Homework Help: Need free program to plot expressions in polar coordinates

  1. May 29, 2014 #1
    1. The problem statement, all variables and given/known data
    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.

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

    3. 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.
  2. jcsd
  3. May 29, 2014 #2


    User Avatar

    You could try GNUPlot.
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