Matching substrings with regexp

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Tim
Tim 2014-9-11
回答： per isakson 2014-9-11
I'm trying to identify the subexpressions of a formula such as (real cases much longer):
y = ((a + b) * (c / d) + ( e + f ))
The subexpressions are always separated by pairs of parenthesis as in the example above. It seems like I should be able to use a regular expression with a rule like (intuitively) match "an initial left parenthesis, any characters (but no parenthesis), and a terminating right parenthesis" to get:
(a + b) (c / d) (e + f)
Can anybody suggest a regular expression to do this? Or any way other than a regular expression?

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Guillaume
Guillaume 2014-9-11
编辑：Guillaume 2014-9-11
subexpressions = regexp(expression, '\([^()]+\)', 'match')
will match any sequence with two brackets enclosing one or more non-bracket.

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per isakson
per isakson 2014-9-11
AFAIK: That is not possible with Matlab's regular expression. Recursion is needed. With Perl (and other languages it is possible). See http://perl.plover.com/yak/regex/samples/slide083.html
"any way other than" &nbsp See parse_equation

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