GRAPH2:  This is a graph of the potential resulting from the matlab 
handout Professor Lockhart compiled using the example of two point 
charges, each having a magnitude of unity but opposite in charge.  The 
Cartesian Coordinate System was used in the evaluation of the problem 
with the positive charge located at (0.95,0.95) and the negative charge 
located at (1.95,1.95). This graph of the potential is a view from 
AZ=30, and EL=0.