Python + matplotlib implement filling spiral instance, pythonmatplotlib

Python + matplotlib implement filling spiral instance, pythonmatplotlib

Filling spiral Demonstration Result:

Instance code:

Import matplotlib. pyplot as pltimport numpy as nptheta = np. arange (0, 8 * np. pi, 0.1) a = 1b =. 2for dt in np. arange (0, 2 * np. pi, np. pi/2.0): x = a * np. cos (theta + dt) * np. exp (B * theta) y = a * np. sin (theta + dt) * np. exp (B * theta) dt = dt + np. pi/4.0x2 = a * np. cos (theta + dt) * np. exp (B * theta) y2 = a * np. sin (theta + dt) * np. exp (B * theta) xf = np. concatenate (x, x2 [:-1]) yf = np. concatenate (y, y2 [:-1]) p1 = plt. fill (xf, yf) plt. show ()

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