GRAPH3:  This is graph of the gradient 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 was constructed using the default view 
set at AZ=-37.5, and EL=30.