MATLAB: Matlab does not recognise hyphen

hyphen not recognisedMATLAB

Hi all,

I'm trying to remove a simple hyphen "-" from a string array. But matlab does not seem to recognise the hyphen. I'm sourcing the text from a website and storing the text in a string array. Then by using strrep(myStringArray,'-','_') I'm trying to remove the hyphen. The weired thing is matlab does not remove it but when I stop the program in the debugger and locally execute this command again it works. Any thoughts on this highly appretiated!

Best Answer

Hi all,

thanks a lot for all your answers!!!

This is a really weired one I'm pulling the text from websites. I tried native2unicode() and renaming it (e.g. myNewArray). Nothing worked.

I finally worked around it by using the function "isletter" and using a for loop since isletter doesn't take a string array:

for iLine=1:length(myStringArray)
            currentChangeLine=char(myStringArray(iLine));
            idxUnderscore=strfind(currentChangeLine,'_'); % I have some underscores which I want to keep
            idxWhiteSpace=find(isspace(currentChangeLine));
            idxIsDigit=find(isstrprop(currentChangeLine,'digit')); % also I want to keep digits in the text
            idxNotALetter=find(~isletter(currentChangeLine));
            idxChange=setdiff(idxNotALetter,[idxUnderscore,idxWhiteSpace,idxIsDigit]); 
            % the line above is to work out the indices where it's not a letter and not a digit,white space or underscore
            % i.e. this will filter out hyphens but alos other symbols like &,@, etc.
            currentChangeLine(idxChange)='_';  % replace the hyphen with an underscore 
            myStringArray(iLine)=currentChangeLine;
end

It's not a neat solution but it worked!

Once again thanks a lot for all your help!

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Hi,

at least the doc states that the mxChar type is 2 byte:

http://www.mathworks.com/help/matlab/apiref/mxchar.html

What happens when you use mxCreateCharArray together with a mxGetData and a memcopy? Or you use a loop to write the data in and cast accordingly?

mxArry *tmp = mxCreateCharArray(...)
mxChar *charData = (mxChar *)mxGetData(tmp);
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