time   calls  line
                500 function [numColumns, numHeaderRows, numHeaderCols, numHeaderChars] = ...
                501     analyze(fileString, delim, header, bufsize)
                502 %ANALYZE count columns, header rows and header columns
                503 
             4  504 numColumns = 0; 
             4  505 numHeaderRows = 0; 
             4  506 numHeaderCols = 0; 
             4  507 numHeaderChars = 0; 
                508 
             4  509 if ~isnan(header) 
             4  510     numHeaderRows = header; 
             4  511 end 
                512 
  0.89       4  513 Data = textscan(fileString,'%[^\n\r]',1,'headerlines',numHeaderRows,... 
                514     'delimiter',delim.requested,'bufsize', bufsize);
             4  515 thisLine = Data{1}; 
                516 
             4  517 if isempty(thisLine) 
                518     return;
                519 end
             4  520 thisLine = thisLine{:}; 
                521 
  0.02       4  522 [isvalid, numHeaderCols, numHeaderChars] = isvaliddata(thisLine, delim); 
                523 
             4  524 if ~isvalid && isnan(header) 
                525     numHeaderRows = numHeaderRows + 1;
                526     Data = textscan(fileString,'%[^\n\r]',1,'headerlines',numHeaderRows,...
                527         'delimiter',delim.requested, 'bufsize', bufsize);
                528 
                529     thisLine = Data{1};
                530     if isempty(thisLine)
                531         return;
                532     end
                533     thisLine = thisLine{1};
                534     
                535     [isvalid, numHeaderCols, numHeaderChars] = isvaliddata(thisLine, delim);
                536     while ~isvalid 
                537         % stop now if the user specified a number of header lines
                538         if ~isnan(header) && numHeaderRows == header
                539             break;
                540         end
                541         numHeaderRows = numHeaderRows + 1;
                542         if numHeaderRows >= 1000
                543             %Assume no data.
                544             Data = textscan(fileString,'%[^\n\r]','headerlines',numHeaderRows,...
                545                 'delimiter',delim.requested, 'bufsize', bufsize);
                546             thisLine = Data{1};
                547             numHeaderRows = length(thisLine) + numHeaderRows;
                548             break;
                549         end
                550         Data = textscan(fileString,'%[^\n\r]',1,'headerlines',numHeaderRows,...
                551                 'delimiter',delim.requested, 'bufsize', bufsize);
                552             
                553         thisLine = Data{1};            
                554         if isempty(thisLine)
                555             break;
                556         end
                557         thisLine = thisLine{1};
                558         [isvalid, numHeaderCols, numHeaderChars] = isvaliddata(thisLine, delim);  
                559     end
                560 end
                561 
                562 % This check could happen earlier
             4  563 if ~isnan(header) && numHeaderRows >= header 
             4  564     numHeaderRows = header; 
             4  565 end 
                566 
             4  567 if isvalid 
                568     % determine num columns
                569     %remove trailing spaces.  Spaces are different from other delimiters.
             4  570     thisLine = regexprep(thisLine, ' +$', ''); 
             4  571     delimiterIndexes = strfind(thisLine, delim.printed); 
             4  572     if all(delim.printed ==' ') && length(delimiterIndexes) > 1 
             4  573         delimiterIndexes = delimiterIndexes([true diff(delimiterIndexes) ~= 1]); 
             4  574 		delimiterIndexes = delimiterIndexes(delimiterIndexes > 1); 
             4  575     end 
                576     
                577     % format string should have 1 more specifier than there are delimiters
             4  578     numColumns = length(delimiterIndexes) + 1; 
             4  579     if numHeaderCols > 0 
                580         % add one to numColumns because the two set of columns share a delimiter
                581         numColumns = numColumns - numHeaderCols;
                582     end
             4  583 end 

Other subfunctions in this file are not included in this listing.