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How can I determine whether a string contains a substring?

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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?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 10 Jan 2020
Edited: MathWorks Support Team on 2 Mar 2020
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
You may find more information about 'contains' at the following documentation page:

  1 Comment

Praveen Manupati
Praveen Manupati on 12 Jul 2019
contains(largeString1, smallSubstring)
The above line will also work and gives logical output similar to your example. Thanks!

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More Answers (2)

Royi Avital
Royi Avital on 26 Aug 2018
Edited: Royi Avital on 26 Aug 2018
I guess that since MATLAB R2016b it is recommended to use `contains` :
https://www.mathworks.com/help/matlab/ref/contains.html

Praveen Manupati
Praveen Manupati on 12 Jul 2019
contains(largeString1, smallSubstring)
The above line will also work and gives logical output. Thanks!

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