% This example illustrates order reduction after realization (here, % object-oriented realization) using the 1-D approach. It also shows % that some factorizations that cannot be found during the realization % phase might be found using the 1-D order reduction technique. % We shall consider the right hand side member of: % [d3*d1+d3*d2+d4*d1+d4*d2;d1+d2] = [d3+d4;1]*(d1+d2) % (order 8 on the left, 4 on the right). % Realization: lfrs d1 d2 d3 d4 S = [d3*d1+d3*d2+d4*d1+d4*d2 ; d1+d2]; % Then, "minlfr1" is used for reducing the size of the Delta-block Smin = minlfr1(S); % resulting in size(S) size(Smin) % The order of Smin is four, that means that the factorization "was % found".