Pie Chart in MATLAB

MATLAB Tutorial

🥧 Pie Chart in MATLAB

A pie chart in MATLAB is used to show the proportion (percentage) of parts to a whole.

It is commonly used in statistics, business reports, surveys, and result analysis.
MATLAB is developed by MathWorks.

🔹 What Is a Pie Chart?

  • Circular chart divided into slices

  • Each slice represents a percentage

  • Created using the pie() function

1️⃣ Basic Pie Chart

🔸 Syntax

pie(data)

🔸 Example


Output:

A pie chart with 4 slices showing relative proportions.

2️⃣ Pie Chart with Labels


📌 Labels help identify each slice.

3️⃣ Exploded Pie Chart

Highlights specific slices by separating them.


4️⃣ Pie Chart Showing Percentages Automatically


📌 MATLAB automatically calculates and displays percentages.

5️⃣ Donut-Style Pie Chart (Advanced)


📌 Useful for modern dashboards.

6️⃣ Pie Chart Example: Student Marks


⚠️ Important Notes

  • Pie charts work best with few categories

  • Sum of values represents 100%

  • Avoid too many slices (reduces clarity)

  • Not ideal for very precise comparison

🎯 Interview Questions: Pie Chart in MATLAB

🔹 Q1. Which function is used to create a pie chart in MATLAB?

Answer: pie()

🔹 Q2. What type of data is best showing using a pie chart?

Answer: Percentage or proportion data.

🔹 Q3. How do you add labels to a pie chart?

Answer: By passing a cell array of labels to pie().

🔹 Q4. What is an exploded pie chart?

Answer: A pie chart where selected slices are separated for emphasis.

🔹 Q5. Can MATLAB automatically calculate percentages?

Answer: Yes, pie() calculates percentages automatically.

🔹 Q6. Is pie chart suitable for large datasets?

Answer: No, it is best for small datasets.

✅ Summary

  • Pie charts show proportions

  • Created using pie()

  • Supports labels & exploded slices

  • Best for simple percentage visualization

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