Dynamic field names in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a structure with a dynamic field name.

MATLAB

fieldName = 'age';
person.[1] = 25;

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

A(fieldName)

BfieldName

C{fieldName}

DfieldName()

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot notation without parentheses for dynamic field names.

Using curly braces instead of parentheses.

In MATLAB, dynamic field names are accessed using parentheses and the field name as a string: person.(fieldName).

2fill in blank

medium

Complete the code to read a dynamic field value from a structure.

MATLAB

field = 'score';
value = data.[1];

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

A{field}

Bfield

C(field)

D.field

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot notation without parentheses.

Using curly braces instead of parentheses.

To access a dynamic field in MATLAB, use parentheses with the field name string: data.(field).

3fill in blank

hard

Fix the error in the code to correctly assign a value to a dynamic field.

MATLAB

fieldName = 'height';
person.[1] = 180;

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

A(fieldName)

BfieldName

C{fieldName}

D['fieldName']

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot notation without parentheses.

Using curly braces or brackets instead of parentheses.

Dynamic field names require parentheses around the variable holding the field name string: person.(fieldName).

4fill in blank

hard

Fill both blanks to create a structure with dynamic field names and assign values.

MATLAB

fields = {'name', 'age'};
values = {'Alice', 30};
for i = 1:length(fields)
    person.[1] = values{i};
end

% Access the age field dynamically
ageValue = person.[2];

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

A(fields{i})

B(values{i})

C(fields{2})

D(fields)

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot notation without parentheses inside the loop.

Accessing the field without parentheses.

Use person.(fields{i}) to assign values dynamically in the loop, and person.(fields{2}) to access the 'age' field.

5fill in blank

hard

Fill all three blanks to create a structure with dynamic fields, assign values, and check a condition.

MATLAB

fields = {'height', 'weight', 'age'};
values = [170, 65, 25];
for i = 1:length(fields)
    person.[1] = values(i);
end

if person.[2] > 20
    status = '[3]';
else
    status = 'young';
end

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

A(fields{i})

B(fields{3})

Cadult

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot notation without parentheses.

Using wrong field name for the condition.

Forgetting to put quotes around the status string.

Assign values dynamically with person.(fields{i}), check the 'age' field with person.(fields{3}), and set status to 'adult' if age > 20.