Given text = 'banana bandana', which MATLAB code correctly finds all starting indices of the substring 'ana' within text?

hard📝 Application Q9 of 15

MATLAB - String Handling

Given text = 'banana bandana', which MATLAB code correctly finds all starting indices of the substring 'ana' within text?

Apositions = contains(text, 'ana');

Bpositions = strfind(text, 'ana');

Cpositions = find(text == 'ana');

Dpositions = strfind('ana', text);

Step-by-Step Solution

Solution:

Step 1: Use strfind for substring indices
strfind returns all starting indices of substring occurrences.
Step 2: Check other options
contains returns logical, not indices; find cannot compare strings like this; reversed arguments in positions = strfind('ana', text); are incorrect.
Final Answer:
positions = strfind(text, 'ana'); -> Option B
Quick Check:
Indices required, only strfind returns them correctly [OK]

Quick Trick: strfind returns all substring start indices [OK]

Common Mistakes:

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