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Circular (polar) histogram in Python
To plot circular (polar) histogram in Python, we can take the following steps−
- Create data points for theta, radii and width using numpy.
- Add a subplot to the current figure, where projection='polar' and nrows=1, ncols=1 and index=1.
- . Make a bar plot using bar() method, with theta, radii and width data points
- Iterate radii and bars after zipping them together and set the face color of the bar and the alpha value. Lesser the alpha value, greater the transparency.
- To display the figure, use show() method.
Example
import numpy as np import matplotlib.pyplot as plt plt.rcParams["figure.figsize"] = [7.00, 3.50] plt.rcParams["figure.autolayout"] = True N = 20 theta = np.linspace(0.0, 2 * np.pi, N, endpoint=False) radii = 10 * np.random.rand(N) width = np.pi / 4 * np.random.rand(N) ax = plt.subplot(111, projection='polar') bars = ax.bar(theta, radii, width=width, bottom=0.0) for r, bar in zip(radii, bars): bar.set_facecolor(plt.cm.rainbow(r / 10.0)) bar.set_alpha(0.5) plt.show()
Output
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