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?
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MathWorks Support Team
2025-1-28
编辑：MathWorks Support Team
2025-1-28
You can use the "contains" function to determine whether a string contains a given substring or not. Specifically, "contains" function 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
1 个评论
If you only want to detect a substring at the end of the larger string, use endsWith instead of contains. The corresponding function for detecting substrings at the beginning is startsWith.
A = ["MATLAB", "laboratory", "collaboration"];
startsWith(A, "lab")
endsWith(A, "lab", 'IgnoreCase', true) % LAB is close enough to lab
contains(A, "lab")
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Royi Avital
2018-8-26
编辑：MathWorks Support Team
2022-11-29
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