Why MATLAB is used in engineering and science - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a matrix of zeros with 3 rows and 4 columns.

MATLAB

A = zeros([1], 4);

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

A4

B3

C5

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using the number of columns as the first argument.

The zeros function creates a matrix filled with zeros. The first argument is the number of rows.

2fill in blank

medium

Complete the code to calculate the sine of 45 degrees (in radians).

MATLAB

result = sin([1]);

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

A45

B90

Cpi/4

Dpi/2

Attempts:

3 left

💡 Hint

Common Mistakes

Using degrees directly without converting to radians.

MATLAB's sin function expects radians. 45 degrees equals pi/4 radians.

3fill in blank

hard

Fix the error in the code to compute the mean of vector v.

MATLAB

average = [1](v);

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

Amean

Bmax

Clength

Dsum

Attempts:

3 left

💡 Hint

Common Mistakes

Using sum or length instead of mean.

The mean function calculates the average value of elements in a vector.

4fill in blank

hard

Fill both blanks to create a vector x with values from 1 to 10 with step 2.

MATLAB

x = [1]:[2]:10;

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

A1

B2

C3

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong start or step values.

The colon operator syntax is start:step:end. Here, start is 1 and step is 2.

5fill in blank

hard

Fill all three blanks to create a structure with fields 'name', 'age', and 'score'.

MATLAB

student.[1] = 'Alice'; student.[2] = 20; student.[3] = 95;

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

Aname

Bage

Cscore

Dgrade

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect field names or typos.

Structures use dot notation to assign values to fields. The fields are 'name', 'age', and 'score'.