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Regular expressions, words in a pattern
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I am trying to generate a pattern including the following items:
do not run
does not run
has not run
have not run
and here comes the problem...
have not recently run
or
do not go out or run
so, what I am using is the following: '((do(es)|ha(s|ve)|did|are)\s?no(t)\s?(\w+)\s?run*)' trying to capture with '(\w+)\s' the fact that other words could be in between, but it does not work with words in between. The text is a string... Thanks in advance
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Answers (3)
Simon
on 20 Nov 2013
Hi!
"\w" does not match spaces!
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Simon
on 20 Nov 2013
It does in my test:
str = 'have not recently run';
pattern = '((do(es)|ha(s|ve)|did|are)\s?no(t)\s?(\w+)\s?run*)';
[a,b] = regexp(str, pattern, 'start', 'tokens');
Do you have more than one space in front of or behind "recently"? Then "\s?" doesn't match.
You may also remove the outer parentheses around your pattern to get all matches like:
str = 'have not recently run';
pattern = '(do(es)|ha(s|ve)|did|are)\s?no(t)\s?(\w+)\s?run*';
[a,b] = regexp(str, pattern, 'start', 'tokens');
b{:}
Image Analyst
on 20 Nov 2013
I'm very confused by what you want to do - I have no idea if you want to generate patterns from combinations of those phrases, or if you want to extract words or phrases in that list from larger sentences. Anyway (whatever you want to do), I think that either ismember () or allwords may be useful to you.
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