time   calls  line
                  1 function [x,ok] = str2num(s)
                  2 %STR2NUM Convert string matrix to numeric array.
                  3 %   X = STR2NUM(S) converts a character array representation of a matrix of
                  4 %   numbers to a numeric matrix. For example,
                  5 %       
                  6 %        S = ['1 2'         str2num(S) => [1 2;3 4]
                  7 %             '3 4']
                  8 %
                  9 %   The numbers in the string matrix S should be ASCII character
                 10 %   representations of a numeric values.  Each number may contain digits,
                 11 %   a decimal point, a leading + or - sign, an 'e' or 'd' preceding a
                 12 %   power of 10 scale factor, and an 'i' or 'j' for a complex unit.
                 13 %
                 14 %   If the string S does not represent a valid number or matrix,
                 15 %   STR2NUM(S) returns the empty matrix.  [X,OK]=STR2NUM(S) will
                 16 %   return OK=0 if the conversion failed.
                 17 %
                 18 %   CAUTION: STR2NUM uses EVAL to convert the input argument, so side
                 19 %   effects can occur if the string contains calls to functions.  Use
                 20 %   STR2DOUBLE to avoid such side effects or when S contains a single
                 21 %   number.
                 22 %
                 23 %   Also spaces can be significant.  For instance, str2num('1+2i') and 
                 24 %   str2num('1 + 2i') produce x = 1+2i while str2num('1 +2i') produces
                 25 %   x = [1 2i].  These problems are also avoided when you use STR2DOUBLE.
                 26 %    
                 27 %   See also STR2DOUBLE, NUM2STR, HEX2NUM, CHAR.
                 28 
                 29 %   Copyright 1984-2007 The MathWorks, Inc.
                 30 %   $Revision: 5.31.4.9 $  $Date: 2010/08/23 23:13:25 $
                 31 
            52   32 if ~ischar(s) || ndims(s)>2 
                 33    error(message('MATLAB:str2num:InvalidArgument'))
                 34 end
                 35 
            52   36 if isempty(s) 
                 37     x = [];
                 38     ok=false;
                 39     return
                 40 end
                 41 
            52   42 [m,n] = size(s); 
            52   43 if m==1, 
                 44   % Replace any char(0) characters with spaces
            52   45   s(s==char(0)) = ' '; 
            52   46   [x,ok] = protected_conversion(['[' s ']']); % Always add brackets 
                 47 else
                 48     semi = ';';
                 49     space = ' ';
                 50     if ~any(any(s == '[' | s == ']')), % String does not contain brackets
                 51         o = ones(m-1,1);
                 52         s = [['[';space(o)] s [semi(o) space(o);' ]']]';
                 53     elseif ~any(any(s(1:m-1,:) == semi)), % No ;'s in non-last rows
                 54         s = [s,[semi(ones(m-1,1));space]]';
                 55     else                               % Put ;'s where appropriate
                 56         spost = space(ones(m,1));
                 57         for i = 1:m-1,
                 58             last = find(s(i,:) ~= space,1,'last');
                 59             if s(i,n-last+1) ~= semi,
                 60                 spost(i) = semi;
                 61             end
                 62         end
                 63         s = [s,spost]';
                 64     end
                 65     [x,ok] = protected_conversion(s);
                 66 end
            52   67 if isnumeric(x) 
            52   68     return 
                 69 end
                 70 if ischar(x) || iscell(x)
                 71    x = [];
                 72    ok = false;
                 73 end

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