Phase Space Flow
2D ODE visualizer — vector field, nullclines, trajectories
System:
Pendulum
Van der Pol
Duffing
FitzHugh-Nagumo
Lotka-Volterra
Custom
ẋ=
x-x*x*x-y
ẏ=
0.08*(x-0.7*y+0.8)
Draw Field
Clear Traj
Nullclines
Click canvas to launch trajectories.
Pendulum: ẋ=y, ẏ=−sin(x)−0.1y
Red nullcline: ẋ=0. Blue nullcline: ẏ=0. Intersections = fixed points.