The Karplus Equation is given by

Where **A**, **B**, **C** are empirical constants (Hz), and
is the azimuthal angle (degrees).

To plot the Karplus equation enter the parameters (i.e., A, B, C) and hit **New Plot**.
Up to 5 plots can be displayed at one time. The **Clear** button will remove all plots. To see the parameters
for each plot hit the **Legend on/off** button. The **Redraw** button will refresh the graph. This is useful when
the function domain (i.e., ) has been changed. To see the value of each plot
at a given point, move your cursor to the desired location then click and hold.