Logical indexing in MATLAB - Mini Project: Build & Apply

Logical Indexing in MATLAB

📖 Scenario: You work in a small store and have a list of product prices. You want to find which products are expensive, meaning their price is above a certain amount.

🎯 Goal: Learn how to use logical indexing in MATLAB to select and display only the expensive products from a list of prices.

📋 What You'll Learn

Create a vector of product prices

Create a threshold price variable

Use logical indexing to find prices above the threshold

Display the filtered expensive prices

💡 Why This Matters

🌍 Real World

Stores often need to filter products by price to create sales or promotions.

💼 Career

Logical indexing is a key skill in data analysis and helps quickly select data based on conditions.

1

Create the product prices vector

Create a vector called prices with these exact values: [10, 25, 30, 15, 50, 5]

MATLAB

% Create a vector called prices with the values [10, 25, 30, 15, 50, 5]
% Your code here

Need a hint?

Use square brackets to create a vector in MATLAB.

2

Set the threshold price

Create a variable called threshold and set it to 20

MATLAB

prices = [10, 25, 30, 15, 50, 5];
% Create a variable called threshold and set it to 20
% Your code here

Need a hint?

Just assign the number 20 to the variable threshold.

3

Use logical indexing to find expensive products

Create a variable called expensive that uses logical indexing on prices to select only prices greater than threshold

MATLAB

prices = [10, 25, 30, 15, 50, 5];
threshold = 20;
% Use logical indexing to create expensive with prices greater than threshold
% Your code here

Need a hint?

Use prices > threshold inside parentheses to select elements.

4

Display the expensive products

Write a disp statement to display the variable expensive

MATLAB

prices = [10, 25, 30, 15, 50, 5];
threshold = 20;
expensive = prices(prices > threshold);
% Display the expensive prices
% Your code here

Need a hint?

Use disp(expensive) to show the filtered prices.