Given a structure array books with fields Title and Pages, how do you create a new structure array shortBooks containing only books with less than 100 pages?

hard📝 Application Q15 of 15

MATLAB - Cell Arrays and Structures

Given a structure array books with fields Title and Pages, how do you create a new structure array shortBooks containing only books with less than 100 pages?

AshortBooks = books(books.Pages < 100);

BshortBooks = books([books.Pages] < 100);

CshortBooks = books{books.Pages < 100};

DshortBooks = books(books.Pages > 100);

Step-by-Step Solution

Solution:

Step 1: Extract numeric array of Pages
Use [books.Pages] to get all Pages values as a numeric array.
Step 2: Use logical indexing to filter
Compare with < 100 to get logical indices, then index books with these.
Step 3: Check syntax correctness
shortBooks = books([books.Pages] < 100); correctly uses parentheses and logical indexing; others are incorrect.
Final Answer:
shortBooks = books([books.Pages] < 100); -> Option B
Quick Check:
Logical indexing with [books.Pages] works [OK]

Quick Trick: Use [struct.field] for numeric indexing [OK]

Common Mistakes:

Using curly braces {} instead of parentheses ()
Forgetting to use brackets [] around field extraction
Using wrong comparison operator

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More MATLAB Quizzes

Given a structure array books with fields Title and Pages, how do you create a new structure array shortBooks containing only books with less than 100 pages?

Step 1: Extract numeric array of Pages

Step 2: Use logical indexing to filter

Step 3: Check syntax correctness

Final Answer:

Quick Check:

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