The system is created with TF model System matrices obtained by printss() member function. State-space arguments: A = -4.120000 -17.400000 -30.800000 -60.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 B = 1.000000 0.000000 0.000000 0.000000 C = 4.000000 8.400000 30.800000 60.000000 D = 0.000000 System matrices obtained by ssdata() member function. A = -4.120000 -17.400000 -30.800000 -60.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 0.000000 1.000000 0.000000 B = 1.000000 0.000000 0.000000 0.000000 C = 4.000000 8.400000 30.800000 60.000000 D = 0.000000 ZPK information obtained by printzpk() member function. Zero-Pole-Gain parameters: Zero: complex(-0.050000,2.738156) complex(-0.050000,-2.738156) complex(-2.000000,0.000000) Pole: complex(-1.797086,2.213723) complex(-1.797086,-2.213723) complex(-0.262914,2.703862) complex(-0.262914,-2.703862) Gain: 4.000000 ZPK information obtained by zpkdata() member function. z2 = complex(-0.050000,2.738156) complex(-0.050000,-2.738156) complex(-2.000000,0.000000) p2 = complex(-1.797086,2.213723) complex(-1.797086,-2.213723) complex(-0.262914,2.703862) complex(-0.262914,-2.703862) k2 = 4.000000