My frequency response plot of the closed loop system whose transfer function and system matrices are given can not match with the standard plot given. Can I done any thing wrong in my cody?Kindly help

To find the frequency response of the given transfer function G(z1,z2)=C*(Z1*Z2*In-Z1*Aq-z2*Ap)^-1*(z1*Bq+z2*Bp)

[Walter Roberson]

duplicated by later http://uk.mathworks.com/matlabcentral/answers/217500-my-frequency-response-plot-of-the-closed-loop-system-whose-transfer-function-and-system-matrices-ar