A random number r is generated 0 ≤ r ≤ 1
Start with x=0.5 and y= 0.0, and use the linear equations:
if r < A xn = 0.05*x , yn = 0.6*y
if A < r < B xn = 0.05*x , yn = -0.5*y+1.0
if B < r < C xn = 0.46*x-0.32*y , yn = 0.39*x+0.38*y+0.6
if C < r < D xn = 0.47*x-0.15*y , yn = 0.17*x+0.42*y+1.1
if D < r < E xn = 0.43*x+0.28*y , yn = -0.25*x+0.45*y+1.0
else xn = 0.42*x+0.26*y , yn = -0.35*x+0.31*y+0.7
To see the effects of changing the probabilities for the equations:
Select A with west slider
Select B, C, and D with north sliders
Select E with east slider
And press start to see the new tree.