Plotting bubble plots

Let's see how to plot bubble plots. The size of each circle in a 2D bubble plot represents the amplitude of that particular point.

How to do it…

1. Create a new Python file, and import the following packages:

   import numpy as np
   import matplotlib.pyplot as plt 

2. Define the number of values that we should generate:

   # Define the number of values
   num_vals = 40

3. Generate random values for x and y:

   # Generate random values
   x = np.random.rand(num_vals)
   y = np.random.rand(num_vals)

4. Define the area value for each point in the bubble plot:

   # Define area for each bubble
   # Max radius is set to a specified value
   max_radius = 25
   area = np.pi * (max_radius * np.random.rand(num_vals)) ** 2  

5. Define the colors:

   # Generate colors
   colors = np.random.rand(num_vals)

6. Plot these values:

   # Plot the points
   plt.scatter(x, y, s=area, c=colors, alpha=1.0)
   
   plt.show()

7. The full code is in the bubble_plot.py file that's already provided to you. If you run this code, you will see the following figure...