Matrix creation in R Programming - Mini Project: Build & Apply

Matrix creation

📖 Scenario: You are working with a small business that tracks sales data in a table format. You want to create a matrix to organize the sales numbers for analysis.

🎯 Goal: Create a matrix in R with specific sales data, set the number of rows, and display the matrix.

📋 What You'll Learn

Create a matrix with exact values

Set the number of rows correctly

Print the matrix to show the data

💡 Why This Matters

🌍 Real World

Matrices are used to organize data in tables, like sales figures, for easy analysis and visualization.

💼 Career

Knowing how to create and manipulate matrices is important for data analysis, statistics, and many programming jobs involving data.

1

Create the sales data matrix

Create a matrix called sales_matrix with these exact values in this order: 10, 20, 30, 40, 50, 60.

R Programming

# Create a matrix called sales_matrix with values 10, 20, 30, 40, 50, 60
# Your code here

Need a hint?

Use the matrix() function with c() to combine the numbers.

2

Set the number of rows

Modify the sales_matrix to have exactly 2 rows by adding the argument nrow = 2 inside the matrix() function.

R Programming

sales_matrix <- matrix(c(10, 20, 30, 40, 50, 60), nrow = 2)
# Your code here

Need a hint?

Add nrow = 2 inside the matrix() function to set rows.

3

Set the number of columns

Modify the sales_matrix to have exactly 3 columns by adding the argument ncol = 3 inside the matrix() function along with nrow = 2.

R Programming

sales_matrix <- matrix(c(10, 20, 30, 40, 50, 60), nrow = 2, ncol = 3)
# Your code here

Need a hint?

Add ncol = 3 along with nrow = 2 inside the matrix() function.

4

Display the matrix

Write a line to print the sales_matrix so you can see the organized sales data.

R Programming

print(sales_matrix)  # Your code here

Need a hint?

Use the print() function with sales_matrix inside.