function isstableflag = isstable(f,sec)
%ISSTABLE  Determine if filter is stable.
%   FIR objects are always stable (barring round-off issues
%   when implemented recursively), hence this function
%   always returns one.
%
%   See also DFILT/ISSTABLE, FIR/ISFIR.

%   Author(s): R. Losada
%   Copyright 1988-2000 The MathWorks, Inc.
%   $Revision: 1.2 $  $Date: 2000/06/13 21:21:46 $ 

error(nargchk(1,2,nargin));

isstableflag = 1; 
