function  fr = dm2fr(A,B,C,D,E,W,u0)
% fr = dm2fr(A,B,C,D,E,W,u0)
% Descriptor matrix to frequency response.
% A,B,C,D,E - descriptor matrices
% W vector of frequency points
% u0 input gain vector: u = u0*unit phasor

% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
// Revision 1.6  1996/08/24  14:22:23  peter
// Put in a ; to avoid excessive log output.
//
% %% Revision 1.5  1996/08/16 14:26:37  peter
% %% Check and fix size of u0.
% %%
% %% Revision 1.4  1996/08/15 12:50:51  peter
% %% Put in a conj to undo effect of transpose.
% %%
% %% Revision 1.3  1996/08/15 11:53:44  peter

end;

[n,m]=size(u0);
if m>n
  u0=u0';
end;

j = sqrt(-1);
fr = zeros(N,Ny);
i = 0;
for w = W'
  i = i+1;
  FR = C*( (E*j*w - A) \ B*u0 ) + D*u0;
  fr(i,:) = conj(FR');
end;