Which MATLAB function can be used to determine if the substring 'test' exists anywhere within the string variable txt, returning a logical true or false?

easy📝 Conceptual Q1 of 15

MATLAB - String Handling

Which MATLAB function can be used to determine if the substring 'test' exists anywhere within the string variable txt, returning a logical true or false?

Astrfind(txt, 'test')

Bcontains(txt, 'test')

Cfind(txt == 'test')

DindexOf(txt, 'test')

Step-by-Step Solution

Solution:

Step 1: Understand the function purpose
The contains function returns a logical true or false indicating presence of a substring.
Step 2: Check alternatives
strfind returns indices, not logical; find and indexOf are not valid MATLAB functions for this purpose.
Final Answer:
contains(txt, 'test') -> Option B
Quick Check:
Logical output needed, only contains fits [OK]

Quick Trick: Use contains for logical substring check [OK]

Common Mistakes:

Using strfind expecting logical output
Using find for substring search
Assuming indexOf exists in MATLAB

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Which MATLAB function can be used to determine if the substring 'test' exists anywhere within the string variable txt, returning a logical true or false?

Step 1: Understand the function purpose

Step 2: Check alternatives

Final Answer:

Quick Check:

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