%ISSYMMETRIC Determine whether a matrix is real or complex symmetric.
%   ISSYMMETRIC(X) returns true if a square matrix X is (complex) symmetric. 
%   That is, X equals to X.'. Otherwise, it returns false.
%
%   ISSYMMETRIC(X,'skew') returns true if a square matrix X is skew-symmetric.
%   That is, X equals to -X.'. Otherwise, it returns false.
%
%   ISSYMMETRIC(X,'nonskew') is same as ISSYMMETRIC(X).
%
%   X must be a double or single matrix.
%
%   See also ISHERMITIAN.

%   Copyright 2013 The MathWorks, Inc.
%   Built-in function.
