Element-wise operations (.*, ./, .^) in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to multiply each element of vectors A and B element-wise.

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 .* causes matrix multiplication, which may error if dimensions mismatch.

In MATLAB, .* performs element-wise multiplication between arrays.

2fill in blank

medium

Complete the code to divide each element of vector X by corresponding element of Y element-wise.

MATLAB

Z = X [1] Y;

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

A.\

B/

C\

D./

Attempts:

3 left

💡 Hint

Common Mistakes

Using / performs matrix division, not element-wise division.

The ./ operator divides elements of arrays element-wise in MATLAB.

3fill in blank

hard

Fix the error in the code to raise each element of vector V to the power of 3 element-wise.

MATLAB

W = V [1] 3;

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

A^

B.*

C.^

D./

Attempts:

3 left

💡 Hint

Common Mistakes

Using ^ performs matrix power, which is not element-wise.

The .^ operator raises each element of an array to a power element-wise.

4fill in blank

hard

Fill both blanks to compute element-wise multiplication and then element-wise division of vectors A and B.

MATLAB

result = (A [1] B) [2] B;

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

A.*

B+

C./

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using + or - instead of element-wise multiplication or division.

First, use .* for element-wise multiplication, then ./ for element-wise division.

5fill in blank

hard

Fill all three blanks to compute element-wise power, then multiply element-wise, and finally divide element-wise.

MATLAB

output = ((X [1] 2) [2] Y) [3] Z;

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

A.^

B.*

C./

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using + instead of element-wise operators.

Mixing matrix operators with element-wise operators.

Use .^ for element-wise power, .* for element-wise multiplication, and ./ for element-wise division.