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40 lines
1.2 KiB
Python
Executable file
40 lines
1.2 KiB
Python
Executable file
"""
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This example makes custom 'pie charts' as the markers for a scatter plotqu
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Thanks to Manuel Metz for the example
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"""
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import math
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import numpy as np
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import matplotlib.pyplot as plt
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# first define the ratios
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r1 = 0.2 # 20%
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r2 = r1 + 0.4 # 40%
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# define some sizes of the scatter marker
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sizes = [60,80,120]
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# calculate the points of the first pie marker
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#
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# these are just the origin (0,0) +
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# some points on a circle cos,sin
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x = [0] + np.cos(np.linspace(0, 2*math.pi*r1, 10)).tolist()
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y = [0] + np.sin(np.linspace(0, 2*math.pi*r1, 10)).tolist()
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xy1 = zip(x,y)
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# ...
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x = [0] + np.cos(np.linspace(2*math.pi*r1, 2*math.pi*r2, 10)).tolist()
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y = [0] + np.sin(np.linspace(2*math.pi*r1, 2*math.pi*r2, 10)).tolist()
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xy2 = zip(x,y)
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x = [0] + np.cos(np.linspace(2*math.pi*r2, 2*math.pi, 10)).tolist()
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y = [0] + np.sin(np.linspace(2*math.pi*r2, 2*math.pi, 10)).tolist()
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xy3 = zip(x,y)
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fig = plt.figure()
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ax = fig.add_subplot(111)
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ax.scatter( np.arange(3), np.arange(3), marker=(xy1,0), s=sizes, facecolor='blue' )
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ax.scatter( np.arange(3), np.arange(3), marker=(xy2,0), s=sizes, facecolor='green' )
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ax.scatter( np.arange(3), np.arange(3), marker=(xy3,0), s=sizes, facecolor='red' )
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plt.show()
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