Recovering text between parentheses using regexp

Hi,

I am trying to create a regular expression using which i can recover the string between two parenthesis. I have created the following expression

 exp='[^(]+.*[^)]+';
 matchStr = regexp(str,exp,'match');

This expression works fine if the string is off any one of the formats mentioned below:

a) str = '(1r)';

b) str = '(0.5;0.5;'rrr')'; etc

but does not work if the string is off the form

str = '(r)'; or str = '(1)';

i.e. it doesn't pick up string which are just off 1 character between the parenthesis. I think i am missing something very basic here. Is it that regex will not work for single characters and will only work for strings?

Thanks in advance,

Regards,

Giri

[Rik]

You can look for a solution in the question by someone with the exact same question here.

[Stephen23]

See also identical question here:

https://www.mathworks.com/matlabcentral/answers/399512-how-to-get-a-desired-result-using-regexp-in-matlab

[Giri]

Thanks Rik..

Answer 1

[Fangjun Jiang]

exp = '[^()]*'; should be it.

[Giri]

Thanks Fangjun for that.. it works fine... Can you please explain how this works? Is it like, it just ignores ( and ) in the text and takes everything else?

[Fangjun Jiang]

doc regexp

[^c1c2c3]: Any character not contained within the brackets.

expr*: 0 or more times consecutively.