Given a structure array movies with fields Title and Duration (in minutes), which MATLAB code snippet correctly creates a new structure array shortMovies containing only movies shorter than 90 minutes?

hard📝 Application Q8 of 15

MATLAB - Cell Arrays and Structures

Given a structure array movies with fields Title and Duration (in minutes), which MATLAB code snippet correctly creates a new structure array shortMovies containing only movies shorter than 90 minutes?

AshortMovies = movies(movies.Duration < 90);

BshortMovies = movies([movies.Duration] < 90);

CshortMovies = struct('Title', movies.Title([movies.Duration] < 90), 'Duration', movies.Duration([movies.Duration] < 90));

DshortMovies = movies(find(movies.Duration) < 90);

Step-by-Step Solution

Solution:

Step 1: Extract durations
Use [movies.Duration] to get an array of durations.
Step 2: Logical indexing
Create a logical index for durations less than 90.
Step 3: Index structure array
Use the logical index to select elements from movies.
Final Answer:
shortMovies = movies([movies.Duration] < 90); correctly filters the structure array.
Quick Check:
Verify shortMovies contains only movies with duration < 90. [OK]

Quick Trick: Use logical indexing with field arrays [OK]

Common Mistakes:

Using parentheses instead of square brackets for field extraction
Applying logical conditions directly on structure arrays
Incorrect use of find function with logical indexing

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More MATLAB Quizzes

Given a structure array movies with fields Title and Duration (in minutes), which MATLAB code snippet correctly creates a new structure array shortMovies containing only movies shorter than 90 minutes?

Step 1: Extract durations

Step 2: Logical indexing

Step 3: Index structure array

Final Answer:

Quick Check:

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