MATLAB: Regexp qwestion

matrixregexp

Hi everyone

i have an exprecion of the type numstrscheck = regexp(TheString, '-?\d+\.?\d*', 'match');

is there a way that alongside with any other operations that are done inside regexp, to also substitute the letter s of 'TheString' if it has any, with the number one?

Best Answer

TheString = 'gftr dsrew mkjghfdfsde'
out = regexprep(TheString,'s','1')

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MATLAB: Regexp help

regexp(string, '(\d+,)*\d+(\.\d*)?', 'match')

The above is flexible enough to support any number of leading groups of digits and commas (including no leading groups). It is also flexible enough to support the possibility that the decimal point and following digits are not present -- so it supports the equivalent of your \d+ (plain integers without commas or decimal points). Furthermore it supports a trailing decimal point with no digits afterwards.

MATLAB: Help with regexp

s   = '32100';
out = regexp(s,'\d+','match');
cellfun(@str2double,out)

regexp returns the result in a cell array. Thus you cannot directly convert a cell that contains a string number into a proper double.

cellfun loops for each cell and applies the function specified after teh handle @

You have to acces the cell

str2double(out{1}) 
str2num(out{1})

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MATLAB: Regexp help

MATLAB: Help with regexp

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