wilcard usage with strncmp

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sermet OGUTCU
sermet OGUTCU 2021-5-16
评论： sermet OGUTCU 2021-5-16
I have a cell array data (C). I use the following code to find specific character in the C;
find_character = strncmp(C, '* 2020', 7);
How can I use wilcard using strncmp to find all patterns satisfy * [0-9][0-9][0-9][0-9]? For example, if * 1988 or * 2000 exist in C, they can be also extracted.

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Stephen23
Stephen23 2021-5-16
Ran in:
C = {'hello','* 2020','world','* 1923'};
X = ~cellfun(@isempty,regexp(C,'^\* \d{4}$'))
X = 1×4 logical array
0 1 0 1
D = C(X)
D = 1×2 cell array
{'* 2020'} {'* 1923'}
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Stephen23
Stephen23 2021-5-16
Ran in:
"How I can modify the above codes to work consistently with my cell array."
Remove the '$' from the end of the regular expression:
C = {'hello','* 2020 3 28','world','* 1923'};
X = ~cellfun(@isempty,regexp(C,'^\* \d{4}'))
X = 1×4 logical array
0 1 0 1
sermet OGUTCU
sermet OGUTCU 2021-5-16
Thank you very much Stephen.

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更多回答（1 个）

Image Analyst
Image Analyst 2021-5-16
Use the pattern functionality. I think it's easier than regexp().
>> doc pattern

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