🕸️ Day 33: Radar Chart (Spider Chart) in Python

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🔹 What is a Radar Chart?

A Radar Chart visualizes multiple variables on a circular axis.

Each variable:

• Has its own axis

• Starts from the center

• Forms a shape representing performance

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🔹 When Should You Use It?

Use a radar chart when:

• Comparing two or more people

• Comparing product features

• Showing strengths & weaknesses

• Visualizing performance metrics

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🔹 Example Scenario

Comparing Expert vs Novice across skills:

• Logic

• Art

• Code

• Math

• Team

• Speech

Radar charts clearly highlight performance differences.

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🔹 Key Idea Behind It

👉 Each spoke = one skill
👉 Distance from center = score
👉 Shape shows performance pattern
👉 Overlapping shapes show comparison

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🔹 Python Code (Interactive Radar Chart – Plotly)

import plotly.express as px

 import pandas as pd 

 # 1. Organize data into a tidy format

 df = pd.DataFrame({

 'Score': [90, 80, 60, 85, 75, 95, 70, 85, 90, 60, 80, 70],

 'Skill': ['Logic', 'Art', 'Code', 'Math', 'Team', 'Speech'] * 2, 

 'Person': ['Expert', 'Expert', 'Expert', 'Expert', 'Expert', 'Expert',

 'Novice', 'Novice', 'Novice', 'Novice', 'Novice', 'Novice']

 }) 

 # 2. Create the chart 

fig = px.line_polar( 

 df, 

 r='Score',

 theta='Skill', 

 color='Person', 

 line_close=True, 

 template="plotly_dark", 

 color_discrete_sequence=px.colors.qualitative.Pastel ) 

 # 3. Fill the area fig.update_traces(fill='toself', opacity=0.6) fig.show()


📌 Install Plotly if needed:
pip install plotly

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🔹 Output Explanation

• Two colored shapes represent Expert and Novice

• Larger outward shape = higher score

• Overlapping areas show skill differences

• Interactive hover shows exact values