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Diffstat (limited to 'Demo/turtle/tdemo_chaos.py')
-rw-r--r-- | Demo/turtle/tdemo_chaos.py | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/Demo/turtle/tdemo_chaos.py b/Demo/turtle/tdemo_chaos.py deleted file mode 100644 index d4656f8..0000000 --- a/Demo/turtle/tdemo_chaos.py +++ /dev/null @@ -1,59 +0,0 @@ -# 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, colour): - pencolor(colour) - 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() |