Why functions organize MATLAB code - See It in Action

Why functions organize MATLAB code

📖 Scenario: Imagine you are working on a MATLAB project to analyze sales data. You want to keep your code neat and easy to understand by using functions.

🎯 Goal: You will create a simple MATLAB function to calculate the total sales from a list of sales amounts. This will show how functions help organize code.

📋 What You'll Learn

Create a function called totalSales that takes one input argument called sales.

Inside the function, calculate the sum of all values in sales and store it in a variable called total.

Return the variable total as the output of the function.

Call the function totalSales with the sales data [100, 200, 150, 50] and store the result in a variable called result.

Display the value of result using disp.

💡 Why This Matters

🌍 Real World

In real projects, functions help keep code clean and manageable, especially when working with large data or complex calculations.

💼 Career

Knowing how to write and use functions is essential for data scientists and engineers to build reliable and maintainable MATLAB programs.

1

Create the sales data array

Create a variable called sales and set it to the array [100, 200, 150, 50].

MATLAB

# Your code here

Need a hint?

Use square brackets to create the array with the exact numbers.

2

Define the function totalSales

Define a function called totalSales that takes one input argument called sales. Inside the function, create a variable called total that sums all elements of sales. The function should return total.

MATLAB

sales = [100, 200, 150, 50];

% Define the function totalSales below
% Your code here

Need a hint?

Use the sum function to add all elements of the array.

3

Call the function and store the result

Call the function totalSales with the variable sales and store the output in a variable called result.

MATLAB

sales = [100, 200, 150, 50];

function total = totalSales(sales)
    total = sum(sales);
end

% Call the function totalSales with sales and store in result
% Your code here

Need a hint?

Use the function name and pass sales as the argument.

4

Display the total sales result

Use disp to display the value of the variable result.

MATLAB

sales = [100, 200, 150, 50];

function total = totalSales(sales)
    total = sum(sales);
end

result = totalSales(sales);

% Display the result
% Your code here

Need a hint?

Use disp(result) to show the total sales.