need help with matlab "freqz" to plot fitler response

[nhkch]

i have a transfer function H(z)=(1/m^2)((1-z^-m)/(1-z^-1))^2

In order to use the the command "freqz" i need to convert this transfer function to standard delay form..but i don't know how to convert due to the z^-m...
My m is 32...please help...thanks in advance.

 

[monsoon]

z=tf('z',1);
m=32;
Hz=(1/m^2)((1-z^-m)/(1-z^-1))^2;
Hz_imp=impulse(Hz);
freqz(Hz_imp)

 

[phongphanp]

Use help to find mathematics functions such as residue , pole , zero, ODE, ... etc .

 

[nhkch]

Thanks.. It works..
If i want to validate my system to get the same frequecy response. How should i do it?
Apply a signal and run transient...then how to plot the frequency response with the output data with matlab?

 

[phongphanp]

Buy the book on matlab .