MATLAB: How can I extract special contents of a text

regexptext processingtextscan

given a text with several parenthesis in format of (a,b). how can I extract contents of these parenthesis( a and b)? I used textscan and regexp but unsuccessful.

Best Answer

regexp(yourstring, '(?<=\()[^)]+', 'match')

should do it. It matches any sequence of anything but closing brackets preceded by an opening bracket. Note that the opening bracket has to be escaped as it's a special character in regexes.

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MATLAB: Extract the number within the bracket

Any number of regular expression would do 'extract whatever is between two brackets:

str = 'a_b_c_d(1.0)';
regexp(str, '(?<=\()[^)]*(?=\))', 'match', 'once')

is one possibility. This

looks ahead for an opening bracket.
matches any number of characters as long as they're not a closing bracket
looks behind for a closing bracket.

MATLAB: Matching substrings with regexp

subexpressions = regexp(expression, '\([^()]+\)', 'match')

will match any sequence with two brackets enclosing one or more non-bracket.

Best Answer

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MATLAB: Extract the number within the bracket

MATLAB: Matching substrings with regexp

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