http://demonstrations.wolfram.com/PhasePortraitAndFieldDirectionsOfTwoDimensi...
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration plots the phase portrait (or phase plane) and the vector field of directions around the fixed point (0, 0) of the two-dimensional linear system of first-order ordinary differential equations
Contributed by: Santos Bravo Yuste
thanks for sharing, just what I was looking to practice with phase plane drawing.
lonekamo 11 months ago