Plot Implicit Equations Using Matplotlib

Matplotlib does not support the functionality to plot implicit equations, however, you can try a code like the one we have shown here.

Steps

• Create xrange and yrange data points using numpy.
• Return coordinate matrices from coordinate vectors using meshgrid() method.
• Create an equation from x and y.
• Create a 3D contour using contour() method with x, y and the equation.
• To display the figure, use show() method.

Example

from matplotlib import pyplot as plt
import numpy as np
plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True
delta = 0.025
xrange = np.arange(-5.0, 20.0, delta)
yrange = np.arange(-5.0, 20.0, delta)
x, y = np.meshgrid(xrange, yrange)
equation = np.sin(x) - np.cos(y)**2
plt.contour(x, y, equation, [0])
plt.show()

Output

You can use a tool like scipy.optimize to plot implicit equations in Matplotlib.