Python: Real World Machine Learning

Animating bubble plots

Let's look at how to animate a bubble plot. This is useful when you want to visualize data that's transient and dynamic.

How to do it…

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

   import numpy as np
   import matplotlib.pyplot as plt
   from matplotlib.animation import FuncAnimation 

2. Let's define a tracker function that will dynamically update the bubble plot:

   def tracker(cur_num):
       # Get the current index 
       cur_index = cur_num % num_points

3. Define the color:

       # Set the color of the datapoints 
       datapoints['color'][:, 3] = 1.0

4. Update the size of the circles:

       # Update the size of the circles 
       datapoints['size'] += datapoints['growth']

5. Update the position of the oldest datapoint in the set:

    # Update the position of the oldest datapoint ...