MATLAB: How to parse information between two strings using regular expressions

MATLABregular expressions

Hello,

I am trying to parse some information contained between the two strings "<sample>" and "</sample>" . I am new to regular expressions and would like to know what expression suits my requirement. The strings i mentioned have some operators in them. This is making the job difficult.

Regards, Math

Best Answer

str = '<sample>a,b,c</sample>';
out = regexp(str,'((?<=<sample>).*(?=<\/sample>))','match')

t = regexp(str,'<(|\/)sample>','splite')
out = t(~cellfun(@isempty,t))

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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)';
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is one possibility. This

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The Note below "Named Token Operator" indicates that the outermost will be captured, hence ABC and one token.

Note

If an expression has nested parentheses, MATLAB® captures tokens that correspond to the outermost set of parentheses. For example, given the search pattern '(and(y|rew))', MATLAB creates a token for 'andrew' but not for 'y' or 'rew'.

With string arrays, I'd recommend just creating an array of acceptable tokens:

cac = regexp("ABC", ["(ABC)","(A)", "(BC)", "(C)"], 'tokens' );
cac{:}
ans =
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    {["ABC"]}
ans =
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    {["A"]}
ans =
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    {["BC"]}
ans =
  1×1 cell array
    {["C"]}

Best Answer

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MATLAB: Extract the number within the bracket

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