Cell array indexing (curly vs parentheses) in MATLAB - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to access the content of the first cell in the cell array.

MATLAB

value = C[1];

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

A1

B(1)

C[1]

D{1}

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of curly braces returns a cell, not the content.

Using square brackets causes syntax errors.

Curly braces {} are used to access the content inside a cell in MATLAB.

2fill in blank

medium

Complete the code to extract a sub-cell array containing the first two cells.

MATLAB

subCells = C[1];

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

A1:2

B{1:2}

C(1:2)

D[1:2]

Attempts:

3 left

💡 Hint

Common Mistakes

Using curly braces returns contents, not a cell array.

Using square brackets causes syntax errors.

Parentheses () are used to extract a sub-cell array from a cell array.

3fill in blank

hard

Fix the error in the code to assign the content of the second cell to variable x.

MATLAB

x = C[1];

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

A{2}

B(2)

C[2]

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses returns a cell array, not the content.

Using square brackets causes syntax errors.

Curly braces {} are needed to access the content inside the second cell.

4fill in blank

hard

Fill both blanks to create a cell array with two cells and access the content of the first cell.

MATLAB

C = [1], [2];
value = C[3];

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

A'apple'

B'banana'

C1

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of curly braces to access content.

Using numeric values without quotes to create string cells.

The cell array is created with two string cells. Curly braces with 1 access the first cell's content.

5fill in blank

hard

Fill all three blanks to create a cell array, extract a sub-cell array, and get the content of the second cell in the sub-array.

MATLAB

C = [1], [2], [3];
subC = C[4];
value = subC[5];

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

A'cat'

B'dog'

C'bird'

D(2:3)

E(1:2)

F{2}

G{1}

H{3}

Attempts:

3 left

💡 Hint

Common Mistakes

Using curly braces instead of parentheses to get sub-cell array.

Using parentheses instead of curly braces to get content.

The cell array has three string cells. Parentheses with 1:2 extract the first two cells as a sub-cell array. Curly braces with 2 get the content of the second cell in the sub-array.