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copied!<p>I prefer to abuse <a href="http://www.mathworks.se/help/matlab/ref/checkcode.html" rel="nofollow">checkcode</a> (the replacement for old <a href="http://www.mathworks.se/help/matlab/ref/mlint.html" rel="nofollow">mlint</a>) to do the parsing. Here is a suggestion </p> <pre><code>function strNC = removeComments(str) if iscell(str) strNC = cellfun(@removeComments, str, 'UniformOutput', false); elseif regexp(str, '%', 'once') err = getCheckCodeId(str); strNC = regexprep(str, '%[^%]*$', ''); errNC = getCheckCodeId(strNC); if strcmp(err, errNC), strNC = removeComments(strNC); else strNC = str; end else strNC = str; end end function errid = getCheckCodeId(line) fName = 'someTempFileName.m'; fh = fopen(fName, 'w'); fprintf(fh, '%s\n', line); fclose(fh); if exist('checkcode') structRep = checkcode(fName, '-id'); else structRep = mlint(fName, '-id'); end delete(fName); if isempty(structRep) errid = ''; else errid = structRep.id; end end </code></pre> <p>For each line, it checks if we introduce an error by trimming the line from last <code>%</code> to the end of line. </p> <p>For your example it returns:</p> <pre><code>>> removeComments(str) ans = 'myFun( {'test' '%'}); ' 'sprintf(str, '%*8.0f%*s%c%3d\n'); ' 'sprintf(str, '%*8.0f%*s%c%3d\n'); ' 'sprintf(str, '%*8.0f%*s%c%3d\n'); ' 'A = A.';' </code></pre> <p>It does not remove the suppression directive, <code>%#ok</code>, so you get:</p> <pre><code>>> removeComments('a=1; %#ok') ans = a=1; %#ok </code></pre> <p>Which probably is a good thing.</p>

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