Functions of two variables can be visualized in many ways: heat maps in 2D, contour curves in 2D, wireframes in 3D, surfaces in 3D. ... To use 3D graphics in matplotlib, we first need to create an ...

If you do not specify the matrix p, contours for the probability values of 0.5, 0.8 and 0.9 are drawn. You cannot produce graphics until you invoke the CALL GSTART statement. The contour plot remains ...