How can I determine whether a string contains a substring?

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Alan Garger - 2023-12-27T15:23:42+00:00
Question: How can I determine whether a string contains a substring?

I have directory names that end in '0.0100'. I want to be able to skip certain directories by comparing the substring '0.0100' to the directory name. How can I do this?  

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    • Expert Answer

    Profile picture of Prashant Kumar Prashant Kumar answered . 2025-11-20

    You can use the 'contains' function to determine whether a string contains a given substring or not. Specifically, 'contains' returns true if the first argument contains the second argument and false otherwise. For example:
     
     
    >> smallSubstring = '0.0100';
>> largeString1 = 'Item0.0100';
>> largeString2 = 'Item0.0101';
>> contains(largeString1, smallSubstring)

ans =

  logical

   1

>> contains(largeString2, smallSubstring)

ans =

  logical

   0

     


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