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CD School House 9.0 - Wayzata Technology (1994).iso
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lorenz.ode
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1994-03-03
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477b
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22 lines
# LORENZ.ODE
# Lorenz chaotic attractor. Try plotting x against y, or x against t.
# Solve with fifth order Runge-Kutta, auto stepsize, 200 steps
$m 5
$n 200
# Solve from 0 to 50
$f 0
$t 50
#
# Parameters - try changing them a little bit at a time
sigma = 10
r = 28
b = -8/3
# Initial values ( try to start near the attractor, but not critical )
x = -9
y = -8
z = 27
# Differential equations
x' = sigma*(y - x)
y' = -y + r*x - x*z
z' = b*z + x*y