function ir = dm2ir(A,B,C,D,E,T);
% ir = dm2ir(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 1.2 1996/08/10 11:49:39 peter
% %% Fixed multi-input/output problem
% %%
% %% Revision 1.1 1996/08/10 10:26:00 peter
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
[N,M] = size(T);
if M>N
T = T';
N = M;
end;
[Ny,Nu] = size(D);
NN=Ny*Nu;
ir = zeros(N,NN);
i = 0;
for t = T'
i=i+1;
ir(i,:) = reshape(C*exp(A*t)*B, 1,NN);
end;