% ISREAL ISREAL Test For Real Array
% 
% Usage
% 
% The syntax for isreal is 
% 
%    x = isreal(y)
% 
% and it returns a logical 1 if the argument is a real type
% (integer, float, or double), and a logical 0 otherwise.
function x = isreal(y)
  x = any(strcmp({'uint8','int8','uint16','int16','uint32','int32','uint64','int64','float','double','string'},class(y)));