Colon operator for ranges in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a vector from 1 to 5 using the colon operator.

MATLAB

v = 1[1]5;

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

A,

B;

C.

D:

Attempts:

3 left

💡 Hint

Common Mistakes

Using a semicolon instead of a colon.

Using a comma which separates elements but does not create a range.

The colon operator : creates a range from the start value to the end value.

2fill in blank

medium

Complete the code to create a vector from 2 to 10 with step size 2.

MATLAB

v = 2[1]2[2]10;

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

A:

B;

C,

D.

Attempts:

3 left

💡 Hint

Common Mistakes

Using commas instead of colons.

Using only one colon which assumes step size 1.

The colon operator with three parts start:step:end creates a vector starting at start, increasing by step, up to end.

3fill in blank

hard

Fix the error in the code to create a vector from 5 down to 1 using the colon operator.

MATLAB

v = 5[1]1;

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

A-:

B:

C:-

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Using invalid operators like '-:' or ':-'.

Using semicolon which ends a statement.

The colon operator can create decreasing sequences if the start is greater than the end and the step is negative. Here, the default step is +1, so to count down, you must specify the step explicitly.

However, the question only asks to fix the operator, so the colon is correct. To count down, the full syntax is 5:-1:1.

4fill in blank

hard

Complete the code to create a vector from 10 down to 2 with step size 2 using the colon operator.

MATLAB

v = 10:[1]2:2;

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

A:

B-

C-1

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Using semicolon instead of colon.

Using positive step when counting down.

To count down by 2, the step is negative 2, written as -2. Here, the step is constructed by combining the minus sign and the number 2.

5fill in blank

hard

Fill both blanks to create a vector from 1 to 9 with step size 3 using the colon operator.

MATLAB

v = [1]:[2]9;

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

A1

B:

C3

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Using semicolon instead of colon.

Mixing up the order of start, step, and end.

Here, start is 1, step is 3, and end is 9.