init

FOTF Toolbox/@fotf/mtimes.m

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+function G=mtimes(G1,G2)
+% mpower - product of two FOTF objects, series connection
+%
+%   G=G1*G2
+% 
+%   G1, G2 - FOTF objects
+%   G - returns the product of the two FOTF objects
+
+% Copyright (c) Dingyu Xue, Northeastern University, China
+% Last modified 28 March, 2017 
+% Last modified 18 May, 2022 
+   G1=fotf(G1); G2=fotf(G2); 
+   if numel(G1)==1 && numel(G2)==1, G=sisofotftimes(G1,G2);
+   else, [n1,m1]=size(G1); [n2,m2]=size(G2);
+      if m1==n2, G=fotf(zeros(n1,m2)); 
+         for i=1:n1, for j=1:m2
+            for k=1:m1, G(i,j)=G(i,j)+sisofotftimes(G1(i,k),G2(k,j));
+         end, end, end
+      elseif n1*m1==1, G=fotf(zeros(n2,m2));  % if G1 is scalar
+         for i=1:n2, for j=1:m2, G(i,j)=G1*G2(i,j); end, end
+      elseif n2*m2==1, G=fotf(zeros(n1,m1));  % if G2 is scalar
+         for i=1:n1, for j=1:m1, G(i,j)=G2*G1(i,j); end, end
+      else
+         error('The two matrices are incompatible for multiplication')
+end, end, end
+% product of two SISO FOTF objects
+function G=sisofotftimes(G1,G2)
+   G=fotf(G1.den*G2.den,G1.num*G2.num); G=simplify(G);
+   G.ioDelay=G1.ioDelay+G2.ioDelay;
+end