time   calls  line
                  1 function s = int2str(x)
                  2 %INT2STR Convert integer to string.
                  3 %   S = INT2STR(X) rounds the elements of the matrix X to integers and 
                  4 %   converts the result into a string matrix.
                  5 %   Return NaN and Inf elements as strings 'NaN' and 'Inf', respectively.
                  6 %
                  7 %   See also NUM2STR, SPRINTF, FPRINTF, MAT2STR.
                  8 
                  9 %   Copyright 1984-2010 The MathWorks, Inc.
                 10 %   $Revision: 5.20.4.11 $  $Date: 2010/11/22 02:46:49 $
                 11 
                 12 % only work with real portion of x
  0.01     586   13 x = real(x); 
                 14 
                 15 % create a copy of x to use to calculate maximum width in digits
           586   16 widthCopy = x; 
           586   17 if isfloat(x) 
  0.01     586   18     x = 0+round(x); %remove negative zero 
                 19     % replace Inf and NaN with a number of equivalent length for width
                 20     % calcultion
           586   21     widthCopy(~isfinite(widthCopy)) = 314; 
           586   22     formatConversion = '.0f'; 
                 23 elseif isa(x, 'uint64')
                 24     formatConversion = 'lu';
                 25 else
                 26     formatConversion = 'ld';
                 27 end
                 28 
           586   29 if isempty(x) 
                 30     s = '';
           586   31 elseif isscalar(x) 
  0.02     586   32     s = sprintf(['%', formatConversion], x); 
                 33 else
                 34     % determine the variable text field width quantity
                 35     widthMax = double(max(abs(widthCopy(:))));
                 36     if widthMax == 0
                 37         width = 3;
                 38     else
                 39         width = floor(log10(widthMax)) + 3;
                 40     end
                 41 
                 42     format = sprintf('%%%d%s', width, formatConversion);
                 43 
                 44     [rows, cols] = size(x);
                 45     s = char(zeros(rows, width*cols));
                 46     for row = 1:rows
                 47         % use vectorized version of sprintf for each row
                 48         s(row,:) = sprintf(format, x(row,:));
                 49     end
                 50 
                 51     % trim leading spaces from string array within constraints of rectangularity.
                 52     s = strtrim(s);
                 53 end

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