Matplotlib 3.0 Cookbook

How to do it...

The following code block plots a polynomial of the third y = x ** 3 order and plots the area under this curve between two points on the x axis, which is the integral of the function limited by the two points:

1. Define two points a and b that are the limits of integral being plotted and the data for the integral function:

a, b = 5, 9 # integral limits in which the area to be plottedx = np.linspace(0, 10)y = x ** 3 # 3rd order Polynomial curve

2. Define the figure and axes and plot the integral function, set the y axis limit to 0 on the lower bound:

fig, ax = plt.subplots()plt.plot(x, y, 'r', linewidth=2)plt.ylim(0)

3. Plot the shaded region between the two bounds of a and b:

intx = np.linspace(a, b)inty = intx ** 3verts = [(a, ...