time   calls  line
                  1 function b = circshift(a,p)
                  2 %CIRCSHIFT Shift array circularly.
                  3 %   B = CIRCSHIFT(A,SHIFTSIZE) circularly shifts the values in the array A
                  4 %   by SHIFTSIZE elements. SHIFTSIZE is a vector of integer scalars where
                  5 %   the N-th element specifies the shift amount for the N-th dimension of
                  6 %   array A. If an element in SHIFTSIZE is positive, the values of A are
                  7 %   shifted down (or to the right). If it is negative, the values of A
                  8 %   are shifted up (or to the left). 
                  9 %
                 10 %   Examples:
                 11 %      A = [ 1 2 3;4 5 6; 7 8 9];
                 12 %      B = circshift(A,1) % circularly shifts first dimension values down by 1.
                 13 %      B =     7     8     9
                 14 %              1     2     3
                 15 %              4     5     6
                 16 %      B = circshift(A,[1 -1]) % circularly shifts first dimension values
                 17 %                              % down by 1 and second dimension left by 1.
                 18 %      B =     8     9     7
                 19 %              2     3     1
                 20 %              5     6     4
                 21 %
                 22 %   See also FFTSHIFT, SHIFTDIM, PERMUTE.
                 23 
                 24 %   Copyright 1984-2010 The MathWorks, Inc.  
                 25 %   $Revision: 1.11.4.5 $  $Date: 2010/11/17 11:25:58 $
                 26 
                 27 % Error out if there are not exactly two input arguments
          1040   28 if nargin < 2 
                 29     error(message('MATLAB:circshift:NoInputs'))
                 30 end
                 31 
                 32 % Parse the inputs to reveal the variables necessary for the calculations
  0.03    1040   33 [p, sizeA, numDimsA, msg] = ParseInputs(a,p); 
                 34 
                 35 % Error out if ParseInputs discovers an improper SHIFTSIZE input
          1040   36 if (~isempty(msg)) 
                 37     error(message('MATLAB:circshift:InvalidShiftType', msg));
                 38 end
                 39 
                 40 % Calculate the indices that will convert the input matrix to the desired output
                 41 % Initialize the cell array of indices
          1040   42 idx = cell(1, numDimsA); 
                 43 
                 44 % Loop through each dimension of the input matrix to calculate shifted indices
          1040   45 for k = 1:numDimsA 
          2080   46     m      = sizeA(k); 
  1.63    2080   47     idx{k} = mod((0:m-1)-p(k), m)+1; 
          2080   48 end 
                 49 
                 50 % Perform the actual conversion by indexing into the input matrix
  0.42    1040   51 b = a(idx{:}); 

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