Histogram in MATLAB

📊 Histogram in MATLAB

It is widely used in statistics, data analysis, signal processing, and quality control.
MATLAB is developed by MathWorks.

🔹 What Is a Histogram?

• Shows frequency of data values within ranges (bins)

• Helps understand data distribution, spread, and skewness

• Created using the histogram() function (modern replacement for hist)

1️⃣ Basic Histogram

🔸 Syntax

🔸 Example

Output:
A histogram showing how values are distributed across bins.

2️⃣ Histogram with Specified Number of Bins

📌 More bins → more detail, fewer bins → smoother view.

3️⃣ Histogram with Labels

4️⃣ Normalized Histogram (Probability)

Shows probability density instead of frequency.

5️⃣ Histogram with Custom Bin Width

6️⃣ Comparing Two Histograms

7️⃣ Histogram of Real-Life Data (Marks Example)

⚠️ Important Notes

• histogram() is preferring over hist()

• Bin choice affects interpretation

• Best for continuous numerical data

• Can be normalized to probability or PDF

🎯 Interview Questions: Histogram in MATLAB

🔹 Q1. Which function is using to create a histogram in MATLAB?

Answer: histogram()

🔹 Q2. What does a histogram show?

Answer: Distribution and frequency of data values.

🔹 Q3. What are bins in a histogram?

Answer: Intervals that group data values.

🔹 Q4. How do you control the number of bins?

Answer: By passing a number to histogram(data, bins).

🔹 Q5. How do you create a normalized histogram?

Answer: Using 'Normalization','probability'.

🔹 Q6. Difference between bar graph and histogram?

Answer:
Bar graph → categorical data
Histogram → continuous data distribution

✅ Summary

• Histograms visualize data distribution

• Created using histogram()

• Bins control data grouping

• Essential for statistical analysis