% ISSTR ISSTR Test For Character Array (string)
% 
% Usage
% 
% The syntax for isstr is 
% 
%    x = isstr(y)
% 
% and it returns a logical 1 if the argument is a string
% and a logical 0 otherwise.

% Copyright (c) 2002-2006 Samit Basu

function x = isstr(y)
  x = isa(y,'string');