dm13105.m

the code of the book come form the book of marlix laboratory with the book of singal

%dm13105
%计算逆Z变换
syms  z;                     %定义符号变量z
Z1=(z^2)/((z+1)*(z-2));      %定义z变换符号表达式Z1
X1=iztrans(Z1)               %计算Z1的逆z变换符号表达式X1
Z2=z^2/(z^2+3*z+2)           %定义z变换符号表达式Z2
X2=iztrans(Z2)               %计算Z2的逆z变换符号表达式X2