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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 1.7 1996/11/06 16:40:38 peterg
% %% Explicit definition of j
% %%
% %% 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
% %% Now has u0 input vector
% %%
% %% Revision 1.2 1996/08/15 10:24:28 peter
% %% Includes u0 argument.
% %%
% %% Revision 1.1 1996/08/10 14:11:28 peter
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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end;
j = sqrt(-1);
fr = zeros(N,Ny);
i = 0;
for w = W'
i = i+1;
## EjA = E*j*w - A;
## iEjA = conj(EjA)*inv(conj(EjA)*EjA);
## FR = C*iEjA*B*u0 + D*u0;
%% FR = C*( (E*j*w - A) \ B*u0 ) + D*u0;
FR = C*( inv(E*j*w - A)*B*u0 ) + D*u0;
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