%Matrix division.
% \   Backslash or left division.
%     A\B is the matrix division of A into B, which is roughly the
%     same as INV(A)*B , except it is computed in a different way.
%     If A is an N-by-N matrix and B is a column vector with N
%     components, or a matrix with several such columns, then
%     X = A\B is the solution to the equation A*X = B computed by
%     Gaussian elimination. A warning message is printed if A is
%     badly scaled or nearly singular.  A\EYE(SIZE(A)) produces the
%     inverse of A.
%     If A is an M-by-N matrix with M < or > N and B is a column
%     vector with M components, or a matrix with several such columns,
%     then X = A\B is the solution in the least squares sense to the
%     under- or overdetermined system of equations A*X = B. The
%     effective rank, K, of A is determined from the QR decomposition
%     with pivoting. A solution X is computed which has at most K
%     nonzero components per column. If K < N this will usually not
%     be the same solution as PINV(A)*B.  A\EYE(SIZE(A)) produces a
%     generalized inverse of A.
%
% /   Slash or right division.
%     B/A is the matrix division of A into B, which is roughly the
%     same as B*INV(A) , except it is computed in a different way.
%     More precisely, B/A = (A'\B')'. See \.
%
% ./  Array right division.
%     B./A denotes element-by-element division.  A and B
%     must have the same dimensions unless one is a scalar.
%     A scalar can be divided with anything.
%
% .\  Array left division.
%     A.\B. denotes element-by-element division.  A and B
%     must have the same dimensions unless one is a scalar.
%     A scalar can be divided with anything.

%   Copyright 1984-2002 The MathWorks, Inc. 
%   $Revision: 5.8 $  $Date: 2002/04/15 04:10:43 $