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How to make a polygon radar (spider) chart in Python Matplotlib?
To make a polygon radar (spider) chart in Python, we can take the following steps −
Steps
Set the figure size and adjust the padding between and around the subplots.
Create a Pandas dataframe with sports and values columns.
Create a new figure or activate an existing figure.
Add an 'ax' to the figure as part of a subplot arrangement.
Based on data frame values, get the theta value.
Get the values list of the data frame.
Make a bar plot with theta and values data points.
Fill the area between polygon.
To display the figure, use show() method.
Example
import pandas as pd
import matplotlib.pyplot as plt
import numpy as np
plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True
df = pd.DataFrame({'sports': ['Strength', 'Speed', 'Power', 'Agility', 'Endurance', 'Analytical Aptitude'], 'values': [7, 8, 6, 10, 8, 9]})
fig = plt.figure()
ax = fig.add_subplot(111, projection="polar")
theta = np.arange(len(df) + 1) / float(len(df)) * 2 * np.pi
values = df['values'].values
values = np.append(values, values[0])
l1, = ax.plot(theta, values, color="purple", marker="o", label="Name of values")
ax.tick_params(pad=10)
ax.fill(theta, values, 'green', alpha=0.3)
plt.show()Output
It will produce the following output −
Updated on: 01-Feb-2022
2K+ Views
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