Matrix creation in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a 3x3 matrix of zeros.

MATLAB

A = [1](3,3);

Drag options to blanks, or click blank then click option'

Aeye

Bones

Czeros

Drand

Attempts:

3 left

💡 Hint

Common Mistakes

Using ones instead of zeros creates a matrix of ones.

Using eye creates an identity matrix, not zeros.

The zeros function creates a matrix filled with zeros. Here, zeros(3,3) creates a 3x3 matrix of zeros.

2fill in blank

medium

Complete the code to create a 4x4 identity matrix.

MATLAB

I = [1](4);

Drag options to blanks, or click blank then click option'

Azeros

Beye

Cones

Drand

Attempts:

3 left

💡 Hint

Common Mistakes

Using zeros creates a matrix of zeros, not identity.

Using ones creates a matrix of ones, not identity.

The eye function creates an identity matrix. eye(4) creates a 4x4 identity matrix.

3fill in blank

hard

Fix the error in the code to create a 2x5 matrix filled with ones.

MATLAB

M = [1](2, 5);

Drag options to blanks, or click blank then click option'

Azeros

Beye

Crand

Dones

Attempts:

3 left

💡 Hint

Common Mistakes

Using zeros creates a matrix of zeros.

Using eye creates an identity matrix, which is square.

The ones function creates a matrix filled with ones. ones(2,5) creates a 2x5 matrix of ones.

4fill in blank

hard

Fill both blanks to create a 3x3 matrix with random values between 0 and 1.

MATLAB

R = [1]([2], 3);

Drag options to blanks, or click blank then click option'

Arand

B3

C4

Drandn

Attempts:

3 left

💡 Hint

Common Mistakes

Using randn generates random numbers with a normal distribution.

Using wrong size arguments causes dimension errors.

The rand function creates a matrix with random values between 0 and 1. rand(3,3) creates a 3x3 matrix.

5fill in blank

hard

Fill both blanks to create a 2x4 matrix of twos using element-wise multiplication.

MATLAB

M = [1](2, 4) [2] 2;

Drag options to blanks, or click blank then click option'

Aones

B*

D.*

Attempts:

3 left

💡 Hint

Common Mistakes

Using regular multiplication * instead of element-wise .* causes errors.

Leaving the last blank with an operator causes syntax errors.

ones(2,4) creates a matrix of ones. Using element-wise multiplication .* with 2 multiplies each element by 2. The last blank is empty because no extra operator is needed.