time   calls  line
                493 function [data, map, filename, format, paramPairs, msg] = ...
                494         parse_inputs(varargin)
                495 
            40  496 data = []; 
            40  497 map = []; 
            40  498 filename = ''; 
            40  499 format = ''; 
            40  500 paramPairs = {}; 
            40  501 msg = ''; 
                502 
            40  503 if (nargin < 2) 
                504     msg = 'Too few input arguments';
                505     return;
                506 end
                507 
  0.01      40  508 firstString = []; 
            40  509 for k = 1:length(varargin) 
            80  510     if (ischar(varargin{k})) 
            40  511         firstString = k; 
            40  512         break; 
                513     end
            40  514 end 
                515 
  0.01      40  516 if (isempty(firstString)) 
                517     msg = 'Invalid input arguments: missing filename';
                518     return;
                519 end
                520 
            40  521 switch firstString 
            40  522 case 1 
                523     msg = 'Invalid input arguments: first argument should not be a string';
                524     return;
                525     
            40  526 case 2 
                527     % imwrite(data, filename, ...)
            40  528     data = varargin{1}; 
            40  529     filename = varargin{2}; 
                530     
                531 case 3
                532     % imwrite(data, map, filename, ...)
                533     data = varargin{1};
                534     map = varargin{2};
                535     filename = varargin{3};
                536     if (size(map,2) ~= 3)
                537         msg = 'Invalid colormap';
                538         return;
                539     end
                540     
                541     if ((min(map(:)) < 0) || (max(map(:)) > 1))
                542         warning('MATLAB:imwrite:colormapRange', 'Colormap data should be in the range 0 to 1.')
                543     end
                544 
                545 otherwise
                546     msg = 'Invalid input arguments: missing filename';
                547     return;
                548 end
                549 
            40  550 if (length(varargin) > firstString) 
                551     % There are additional arguments after the filename.
            40  552     if (~ischar(varargin{firstString + 1})) 
                553         msg = 'Invalid input arguments.';
                554         return;
                555     end
                556     
                557     % Is the argument after the filename a format specifier?
  0.03      40  558     fmt_s = imformats(varargin{firstString + 1}); 
                559     
            40  560     if (~isempty(fmt_s)) 
                561         % imwrite(..., filename, fmt, ...)
            40  562         format = varargin{firstString + 1}; 
            40  563         paramPairs = varargin((firstString + 2):end); 
                564         
                565     else
                566         % imwrite(..., filename, prop1, val1, prop2, val2, ...)
                567         paramPairs = varargin((firstString + 1):end);
                568     end
                569     
                570     % Do some validity checking on param-value pairs
            40  571     if (rem(length(paramPairs), 2) ~= 0) 
                572         msg = sprintf('Invalid input syntax or unrecognized format "%s"', ...
                573                       varargin{firstString + 1});
                574         return;
                575     end
                576 
            40  577 end 
                578 
            40  579 for k = 1:2:length(paramPairs) 
           200  580     if (~ischar(paramPairs{k})) 
                581         msg = 'Parameter names must be strings';
                582         return;
                583     end
           200  584 end 

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