Matrix multiplication (*) in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to multiply two matrices A and B.

MATLAB

C = A [1] B;

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

A+

B*

C.+

D.*

Attempts:

3 left

💡 Hint

Common Mistakes

Using .* instead of * for matrix multiplication.

In MATLAB, the * operator performs matrix multiplication.

2fill in blank

medium

Complete the code to multiply matrix M by vector v.

MATLAB

result = M [1] v;

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

A+

B.*

C*

D.^

Attempts:

3 left

💡 Hint

Common Mistakes

Using element-wise operators instead of matrix multiplication operator.

The * operator multiplies matrix M by vector v as a matrix multiplication.

3fill in blank

hard

Fix the error in multiplying matrices A and B.

MATLAB

C = A [1] B;

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

A.*

B-

C+

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using .* which does element-wise multiplication causing dimension errors.

Matrix multiplication requires the * operator, not element-wise .* operator.

4fill in blank

hard

Fill both blanks to compute the product of matrices X and Y and then add matrix Z.

MATLAB

result = X [1] Y [2] Z;

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

A*

B+

C-

D.*

Attempts:

3 left

💡 Hint

Common Mistakes

Using .* for multiplication or - instead of + for addition.

First multiply X and Y using *, then add Z using +.

5fill in blank

hard

Fill all three blanks to multiply matrices A and B, subtract matrix C, then multiply by matrix D.

MATLAB

output = (A [1] B [2] C) [3] D;

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

A*

B-

C+

Attempts:

3 left

💡 Hint

Common Mistakes

Using + instead of - for subtraction or .* instead of * for multiplication.

Multiply A and B with *, subtract C with -, then multiply the result by D with *.