function [a,b,c,d] = sec2ss(h)
%SEC2SS  Convert single-section df2t object to state-space.

%   Author(s): R. Losada
%   Copyright 1988-2000 The MathWorks, Inc. 
%   $Revision: 1.1 $  $Date: 2000/06/13 19:42:40 $ 

[num,den] = tf(h);

% Call eqtflength before using tf2ss
[num,den] = eqtflength(num,den);
% Now structure is associated with this object, so use a canonic state-space
[a,b,c,d] = tf2ss(num,den);