Matrix multiplication (*) in MATLAB - Mini Project: Build & Apply

Matrix multiplication (*)

📖 Scenario: You work in a small company that analyzes sales data. You have two matrices: one with sales quantities and another with prices. You want to find the total sales amount for each product in each region.

🎯 Goal: Build a MATLAB program that multiplies two matrices using the * operator to calculate total sales amounts.

📋 What You'll Learn

Create two matrices with exact values

Create a variable for the result matrix

Use matrix multiplication operator *

Display the resulting matrix

💡 Why This Matters

🌍 Real World

Matrix multiplication is used in many fields like sales analysis, computer graphics, and engineering to combine data efficiently.

💼 Career

Understanding matrix multiplication is essential for data analysts, engineers, and scientists who work with numerical data and models.

1

Create the sales quantity matrix

Create a matrix called quantities with these exact values: [2 3; 4 5]

MATLAB

% Create the quantities matrix
% Your code here

Need a hint?

Use square brackets and semicolons to create a 2x2 matrix.

2

Create the price matrix

Create a matrix called prices with these exact values: [10 20; 30 40]

MATLAB

quantities = [2 3; 4 5];
% Create the prices matrix
% Your code here

Need a hint?

Use the same matrix format as before for prices.

3

Multiply the matrices

Create a variable called total_sales that stores the result of multiplying quantities by prices using the * operator

MATLAB

quantities = [2 3; 4 5];
prices = [10 20; 30 40];
% Multiply quantities and prices matrices
% Your code here

Need a hint?

Use the * operator to multiply matrices in MATLAB.

4

Display the total sales matrix

Use disp(total_sales) to display the total_sales matrix

MATLAB

quantities = [2 3; 4 5];
prices = [10 20; 30 40];
total_sales = quantities * prices;
% Display the total_sales matrix
% Your code here

Need a hint?

Use disp() to print matrices in MATLAB.