not for a string in regular expressions
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How do I search a sequence for a certain match not containing a certain substring?
As in wanting to search an RNA sequence starting with CG and not containing AG in the middle and then ending with it? When I run
regexp(mRNA, 'GU\w+[^AG]AG');
it gives me the location of matches that dont contain either A or G in the middle, and not the 'AG' substring.
Would really appreciate the help!
回答（1 个）
Walter Roberson
2018-2-8
Presuming that mRNA is a cell array of character vectors, then
mask = ~cellfun(@isempty, regexp(mRNA, '^CG([^A]|A[^G])*AG$', 'lineanchors', 'once'));
matched_strings = mRNA(mask);
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2018-2-8
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