Annotating a point on a polar plot

In this recipe, we will learn how to annotate a specific point on a polar plot.

Getting ready

Import the required libraries:

import numpy as np
import matplotlib.pyplot as plt

How to do it...

The following code block plots a polar graph and annotates a point on it:

1. Define the figure and axes on it, and declare the polar projection:

fig = plt.figure()
ax = fig.add_subplot(111, projection='polar')

2. Define the data for the polar plot and plot it:

r = np.arange(0,1,0.001)
theta = 2 * 2*np.pi * r
ax.plot(theta, r, color=[0.9,0.4...