Row and column vectors in MATLAB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a row vector in MATLAB?

A row vector is a 1-by-n matrix, meaning it has 1 row and multiple columns. For example, [1 2 3] is a row vector with 3 elements.

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What is a column vector in MATLAB?

A column vector is an n-by-1 matrix, meaning it has multiple rows and 1 column. For example, [1; 2; 3] is a column vector with 3 elements.

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How do you create a row vector with elements 4, 5, and 6 in MATLAB?

You write the elements separated by spaces or commas inside square brackets: v = [4 5 6];

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How do you create a column vector with elements 4, 5, and 6 in MATLAB?

You write the elements separated by semicolons inside square brackets: v = [4; 5; 6];

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What is the difference between a row vector and a column vector in MATLAB?

A row vector has one row and many columns, written as [a b c]. A column vector has many rows and one column, written as [a; b; c]. They look different and behave differently in operations.

Which of the following is a row vector in MATLAB?

A [1; 2; 3]

B [1 2 3]

C [1, 2; 3, 4]

D [1; 2, 3]

A row vector has elements in one row separated by spaces or commas: [1 2 3].

How do you separate elements to create a column vector in MATLAB?

A With spaces

B With commas

C With semicolons

D With periods

Semicolons separate rows, so [1; 2; 3] creates a column vector.

What is the size of a row vector with 5 elements?

A 1-by-5

B 5-by-1

C 5-by-5

D 1-by-1

A row vector with 5 elements has 1 row and 5 columns, so size is 1-by-5.

What is the size of a column vector with 4 elements?

A 1-by-1

B 1-by-4

C 4-by-4

D 4-by-1

A column vector with 4 elements has 4 rows and 1 column, so size is 4-by-1.

Which MATLAB code creates a column vector?

A v = [7; 8; 9];

B v = [7 8 9];

C v = [7, 8, 9];

D v = [7 8; 9 10];

Using semicolons creates a column vector: [7; 8; 9].

Explain how to create row and column vectors in MATLAB and how they differ.

Think about how elements are separated inside square brackets.

Describe the size (dimensions) of row and column vectors and why it matters.

Remember rows and columns count.