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+//caption:obtain_state_matrix
+//example 12_54
+//page 583
+s=%s;
+g=5*(s+2)/(s*(s+1)*(s+5));
+CL=syslin('c',g);
+disp(CL,"C(s)/R(s)=");
+SS=tf2ss(CL)
+[Ac,Bc,U,ind]=canon(SS(2),SS(3))
+disp(SS,"state space matrix=")
+disp(Ac,"Ac",Bc,"Bc",U,"U",ind,"ind")
+\ No newline at end of file