>> pole(sys2)

ans =

   1.3420
   1.3125 + 0.1728i
   1.3125 - 0.1728i
   1.2229 + 0.3031i
   1.2229 - 0.3031i
   1.2118
   1.0992 + 0.3777i
   1.0992 - 0.3777i
   0.9702 + 0.3984i
   0.9702 - 0.3984i
   0.8540 + 0.3781i
   0.8540 - 0.3781i
   0.7573 + 0.3322i
   0.7573 - 0.3322i
   0.6794 + 0.2731i
   0.6794 - 0.2731i
   0.6174 + 0.2090i
   0.6174 - 0.2090i
   0.5708 + 0.1455i
   0.5708 - 0.1455i
   0.5403 + 0.0855i
   0.5403 - 0.0855i
   0.5254 + 0.0282i
   0.5254 - 0.0282i
   1.3420
   1.3125 + 0.1728i
   1.3125 - 0.1728i
   1.2229 + 0.3031i
   1.2229 - 0.3031i
   1.2118
   1.0992 + 0.3777i
   1.0992 - 0.3777i
   0.9702 + 0.3984i
   0.9702 - 0.3984i
   0.8540 + 0.3781i
   0.8540 - 0.3781i
   0.7573 + 0.3322i
   0.7573 - 0.3322i
   0.6794 + 0.2731i
   0.6794 - 0.2731i
   0.6174 + 0.2090i
   0.6174 - 0.2090i
   0.5708 + 0.1455i
   0.5708 - 0.1455i
   0.5403 + 0.0855i
   0.5403 - 0.0855i
   0.5254 + 0.0282i
   0.5254 - 0.0282i
   1.7995 + 0.1395i
   1.7995 - 0.1395i
   1.7159 + 0.3875i
   1.7159 - 0.3875i
   1.5628 + 0.5742i
   1.5628 - 0.5742i
   1.3701 + 0.6878i
   1.3701 - 0.6878i
   1.5542
   1.1671 + 0.7212i
   1.1671 - 0.7212i
   1.0447 + 0.6569i
   1.0447 - 0.6569i
   0.9375 + 0.7076i
   0.9375 - 0.7076i
   0.7841 + 0.6719i
   0.7841 - 0.6719i
   0.6665 + 0.6029i
   0.6665 - 0.6029i
   0.5803 + 0.5220i
   0.5803 - 0.5220i
   0.5194 + 0.4407i
   0.5194 - 0.4407i
   0.4759 + 0.3651i
   0.4759 - 0.3651i
   0.4430 + 0.2949i
   0.4430 - 0.2949i
   0.4190 + 0.2284i
   0.4190 - 0.2284i
   0.4033 + 0.1662i
   0.4033 - 0.1662i
   0.3934 + 0.1088i
   0.3934 - 0.1088i
   0.3871 + 0.0541i
   0.3871 - 0.0541i
   0.3849
   1.2124 + 0.0622i
   1.2124 - 0.0622i
   1.1600 + 0.1703i
   1.1600 - 0.1703i
   1.0741 + 0.2348i
   1.0741 - 0.2348i
   0.9982 + 0.2525i
   0.9982 - 0.2525i
   0.9248 + 0.2715i
   0.9248 - 0.2715i
   0.8338 + 0.2564i
   0.8338 - 0.2564i
   0.7550 + 0.2050i
   0.7550 - 0.2050i
   0.7002 + 0.1284i
   0.7002 - 0.1284i
   0.6783 + 0.0408i
   0.6783 - 0.0408i
   0.3016
   0.2952 + 0.0083i
   0.2952 - 0.0083i
   0.2871 + 0.0059i
   0.2871 - 0.0059i
   0.2851
   1.2124 + 0.0622i
   1.2124 - 0.0622i
   1.1600 + 0.1703i
   1.1600 - 0.1703i
   1.0741 + 0.2348i
   1.0741 - 0.2348i
   0.9982 + 0.2525i
   0.9982 - 0.2525i
   0.9248 + 0.2715i
   0.9248 - 0.2715i
   0.8338 + 0.2564i
   0.8338 - 0.2564i
   0.7550 + 0.2050i
   0.7550 - 0.2050i
   0.7002 + 0.1284i
   0.7002 - 0.1284i
   0.6783 + 0.0408i
   0.6783 - 0.0408i
   0.3016
   0.2952 + 0.0083i
   0.2952 - 0.0083i
   0.2871 + 0.0059i
   0.2871 - 0.0059i
   0.2851
   1.6902 + 0.1253i
   1.6902 - 0.1253i
   1.5987 + 0.3527i
   1.5987 - 0.3527i
   1.4412 + 0.5200i
   1.4412 - 0.5200i
   1.2549 + 0.6128i
   1.2549 - 0.6128i
   1.0730 + 0.6379i
   1.0730 - 0.6379i
   1.1488
   0.9153 + 0.6140i
   0.9153 - 0.6140i
   0.7873 + 0.5601i
   0.7873 - 0.5601i
   0.6880 + 0.4888i
   0.6880 - 0.4888i
   0.6202 + 0.4094i
   0.6202 - 0.4094i
   0.5707 + 0.3518i
   0.5707 - 0.3518i
   0.5048 + 0.2868i
   0.5048 - 0.2868i
   0.4522 + 0.2048i
   0.4522 - 0.2048i
   0.4124 + 0.1419i
   0.4124 - 0.1419i
   0.3389 + 0.1098i
   0.3389 - 0.1098i
   0.2849 + 0.0826i
   0.2849 - 0.0826i
   0.2549 + 0.0555i
   0.2549 - 0.0555i
   0.2396 + 0.0278i
   0.2396 - 0.0278i
   0.2348

>> pole(sys1)

ans =

   0.6390
   0.9600 + 0.0970i
   0.9600 - 0.0970i
   0.9164
   0.9424 + 0.0838i
   0.9424 - 0.0838i
   0.8941
   0.2919
        0
        0