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Coloring the Intersection of Circles/Patches in Matplotlib
To color the intersection of circles/patches in Matplotlib, we can take the following steps −
- Set the figure size and adjust the padding between and around the subplots.
- Create a and b points.
- Get the left, right and middle area from the two points, a and b.
- Get the current axes using gca() method
- Add patches with different colors and sections.
- Set the X and Y axes scale.
- Set the aspect ratios equal.
- Turn off the axes.
- To display the figure, use show() method.
Example
import shapely.geometry as sg
import matplotlib.pyplot as plt
import descartes
plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True
a = sg.Point(-.5, 0).buffer(1.)
b = sg.Point(0.5, 0).buffer(1.)
left = a.difference(b)
right = b.difference(a)
middle = a.intersection(b)
ax = plt.gca()
ax.add_patch(descartes.PolygonPatch(left, fc='b', ec='k'))
ax.add_patch(descartes.PolygonPatch(right, fc='r', ec='k'))
ax.add_patch(descartes.PolygonPatch(middle, fc='g', ec='k'))
ax.set_xlim(-2, 2)
ax.set_ylim(-2, 2)
ax.set_aspect('equal')
ax.axis('off')
plt.show()Output
Updated on: 07-Jul-2021
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