Read data from string

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Artyom
Artyom on 7 Aug 2013
I have string line:
x='abc123(xyz456)'
How to read information only in brackets, to have result:
y='xyz456'.

Accepted Answer

Evan
Evan on 7 Aug 2013
Edited: Evan on 7 Aug 2013
>> x='abc123(xyz456)';
>> regexp(x,'(?<=\().+(?=\))','match')
ans =
'xyz456'
This command uses regexp and, specifically, lookaround assertions. It's basically saying, if you find a group of characters, look behind to see if there is an "open parenthesis" character and look ahead to see if there is a "close parenthesis" character. If so, return all the characters between them.
  6 Comments
Cedric Wannaz
Cedric Wannaz on 7 Aug 2013
Yep, in other words, it stops when it matches the last part of the pattern for the first time (lazy), but it doesn't pull back the starting point (the tail? ;-)) to minimize the match (not that lazy finally, or really really lazy in fact). Thankfully, you see/understand this once and you never forget it!

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More Answers (2)

Azzi Abdelmalek
Azzi Abdelmalek on 7 Aug 2013
y=regexp(x,'(?<=\()[\w]+(?=\))','match')
  1 Comment
Azzi Abdelmalek
Azzi Abdelmalek on 7 Aug 2013
%or
x=x='abc123 (xyz 45_6) ddd (rtr)ccc'
y=regexp(x,'\(([\w\s]+)\)','tokens');
celldisp(y)

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Jan
Jan on 7 Aug 2013
x = 'abc123(xyz456)';
ini = strfind(x, '(');
fin = strfind(x, ')');
key = x(ini(1) + 1:fin(1) - 1);

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