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Find location of exact string

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Using this line fo code to find "Sine Delta 2" in my xml file which also contains "Cosine Delta 2" and the code returns locaion for both instead of just for "Sine".
How do i return location of the exact string?
row_idx_SineDelta2 = find(~cellfun('isempty',strfind(data,'sine delta 2')))

Accepted Answer

Jorg Woehl
Jorg Woehl on 11 Mar 2021
Edited: Jorg Woehl on 11 Mar 2021
regexp(data, '\<sine delta 2')
The \< indicates that the search string must occur at the beginning of a new word - see MATLAB regexp for the almost limitless possibilities for pattern matching.

More Answers (1)

Jorg Woehl
Jorg Woehl on 11 Mar 2021
Edited: Jorg Woehl on 11 Mar 2021
Starting with R2020b, you can use pattern with strfind, which allows you to only find matches if they are preceded by a nonletter character (i.e. if the search string starts a new word):
pat = letterBoundary + 'sine delta 2';
strfind(data, pat)
Note that this is case-sensitive; in your code you are searching for 'sine delta 2', but you mention 'Sine Delta 2' in your introduction...
Tejashree Pawar
Tejashree Pawar on 11 Mar 2021
Thanks! I am using Matlab2019b for this. Any command or function i can use with this version?
Jorg Woehl
Jorg Woehl on 11 Mar 2021
Yes, I'll add it as a separate answer...

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