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Draw axis lines or the origin for Matplotlib contour plot.
To draw axis lines or the origin for matplotlib contour plot, we can use contourf(), axhline() y=0 and axvline() x=0.
Create data points for x, y, and z using numpy.
To set the axes properties, we can use plt.axis('off') method.
Use contourf() method with x, y, and z data points.
Plot x=0 and y=0 lines with red color.
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 x = np.linspace(-1.0, 1.0, 10) x, y = np.meshgrid(x, x) z = -np.hypot(x, y) plt.axis('off') plt.contourf(x, y, z, 10) plt.axhline(0, color='red') plt.axvline(0, color='red') plt.show()
Output
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