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R Academy · Lesson

Working with Vectors and Matrices

Create and manipulate vectors and matrices to perform basic mathematical and data operations.

Lesson 2 of 310 steps

Working with Vectors and Matrices is a free R Academy lesson on CoddyKit. This is lesson 2 of 3. Any 3 lessons of this learning path are free to read in full — after that, CoddyKit PRO unlocks every lesson, plus hands-on practice with a built-in code editor and a 24/7 AI tutor. It is part of the R Academy learning path, and your progress syncs across the web and the CoddyKit app. The R Academy course includes 3 lessons in total.

Introduction to Vectors in R

Vectors are the most basic data structure in R. They store elements of the same type.

Working with Vectors and Matrices — illustration 1

Creating Vectors

You can create vectors using the c() function.

numbers <- c(1, 2, 3, 4, 5)
numbers

Vector Operations

Vectors support element-wise operations.

x <- c(2, 4, 6)
y <- c(1, 1, 1)
z <- x + y

Accessing Vector Elements

You can access elements using indices.

numbers <- c(10, 20, 30, 40, 50)
numbers[2]

Introduction to Matrices

Matrices store data in rows and columns, containing only one type of data.

Creating Matrices

You can create matrices using the matrix() function.

mat <- matrix(1:9, nrow=3, ncol=3)
mat

Accessing Matrix Elements

You can access elements using row and column indices.

mat[2,3]

Performing Matrix Operations

You can perform arithmetic operations on matrices.

mat1 <- matrix(1:4, nrow=2)
mat2 <- matrix(5:8, nrow=2)
result <- mat1 + mat2

Vectors and Matrices Summary

Summary

In this lesson, you learned:

  • How to create and manipulate vectors.
  • How to create and access matrices.
  • Basic vector and matrix operations.
Working with Vectors and Matrices — illustration 10
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Frequently Asked Questions

Is the “Working with Vectors and Matrices” lesson free?

Yes — any 3 lessons of the R Academy learning path, including “Working with Vectors and Matrices”, are free to read in full here on the web. After that, CoddyKit PRO unlocks every lesson, plus interactive practice with a built-in code editor and a 24/7 AI tutor. The R Academy course includes 3 lessons in total.

What will I learn in “Working with Vectors and Matrices”?

Create and manipulate vectors and matrices to perform basic mathematical and data operations. You practise R Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start R Academy?

No prior experience is required. R Academy on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 2 of 3.

How long does the “Working with Vectors and Matrices” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this R Academy lesson?

Yes. Every R Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. Understanding Data Types
  2. Working with Vectors and Matrices
  3. Lists and Data Frames
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