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Shading an area between two points in a Matplotlib plot
To shade an area between two points in matplotlib, we can take the following steps−
- Create x and y data points using numpy.
- Plot x and y data points, with color=red and linewidth=2.
- To shade an area parallel to X-axis, initialize two variables, y1 and y2.
- To add horizontal span across the axes, use axhspan() method with y1, y2, green as shade color,and alpha for transprency of the shade.
- 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(0, 20, 500) y = np.cos(3*x) + np.sin(2*x) plt.plot(x, y, c='red', lw=2) y1 = 0.5 y2 = -0.5 plt.axhspan(y1, y2, color='green', alpha=0.75, lw=0) plt.show()
Output
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