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File Content: `chaos.py`

# File: tdemo_chaos.py
# Author: Gregor Lingl
# Date: 2009-06-24

# A demonstration of chaos

from turtle import *

N = 80

def f(x):
    return 3.9*x*(1-x)

def g(x):
    return 3.9*(x-x**2)

def h(x):
    return 3.9*x-3.9*x*x

def jumpto(x, y):
    penup(); goto(x,y)

def line(x1, y1, x2, y2):
    jumpto(x1, y1)
    pendown()
    goto(x2, y2)

def coosys():
    line(-1, 0, N+1, 0)
    line(0, -0.1, 0, 1.1)

def plot(fun, start, color):
    pencolor(color)
    x = start
    jumpto(0, x)
    pendown()
    dot(5)
    for i in range(N):
        x=fun(x)
        goto(i+1,x)
        dot(5)

def main():
    reset()
    setworldcoordinates(-1.0,-0.1, N+1, 1.1)
    speed(0)
    hideturtle()
    coosys()
    plot(f, 0.35, "blue")
    plot(g, 0.35, "green")
    plot(h, 0.35, "red")
    # Now zoom in:
    for s in range(100):
        setworldcoordinates(0.5*s,-0.1, N+1, 1.1)
    return "Done!"

if __name__ == "__main__":
    main()
    mainloop()

Name	Size	Permission
__pycache__	---	0755
__init__.py	314 bytes	0644
__main__.py	14241 bytes	0644
bytedesign.py	4247 bytes	0755
chaos.py	951 bytes	0644
clock.py	3200 bytes	0755
colormixer.py	1339 bytes	0644
forest.py	2965 bytes	0755
fractalcurves.py	3472 bytes	0755
lindenmayer.py	2433 bytes	0755
minimal_hanoi.py	2050 bytes	0755
nim.py	6513 bytes	0644
paint.py	1290 bytes	0755
peace.py	1065 bytes	0755
penrose.py	3379 bytes	0755
planet_and_moon.py	2824 bytes	0755
rosette.py	1361 bytes	0644
round_dance.py	1804 bytes	0644
sorting_animate.py	5029 bytes	0644
tree.py	1400 bytes	0755
turtle.cfg	160 bytes	0644
two_canvases.py	1119 bytes	0644
yinyang.py	820 bytes	0755

File Content: chaos.py

File Content: `chaos.py`