% ISFLOAT ISFLOAT Test for Floating Point Array
% 
% Usage
% 
% The syntax for isfloat is
% 
%    x = isfloat(y)
% 
% and it returns a logical 1 if the argument is a floating 
% point array (i.e., a float or double), and a logical
% 0 otherwise.
function x = isfloat(y)
  x = any(strcmp({'float','double'},class(y)));