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function sr = dm2sr(A,B,C,D,E,T);
% sr = dm2sr(A,B,C,D,E,T);
% Descriptor matrix to impulse response.
% NB At the moment - this assumes that E is unity .....
% A,B,C,D,E - descriptor matrices
% T vector of time points
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.1 1996/08/11 09:42:40 peter
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[N,M] = size(T);
if M>N
T = T';
N = M;
end;
[Ny,Nu] = size(D);
NN=Ny*Nu;
[N_y,N_x] = size(C);
one = eye(N_x);
sr = zeros(N,NN);
i = 0;
for t = T'
i=i+1;
SR = C*( A\(exp(A*t)-1) )*B + D*ones(size(t));
sr(i,:) = reshape(C*(1-exp(A*t))*B + D*ones(size(t)), 1,NN);
sr(i,:) = reshape(SR, 1,NN);
end;
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