5.m

已知一个LTI系统的差分方程为： y[n]-1.143*y[n-1]+0.4128*y[n-2]=0.0675*x[n]+0.1349*x[n-1]+0.0675*x[n-2] 初始条件y(-1

b=[0.0675,0.1349,0.0675];a=[1,-1.143,0.4128];
z=roots(b)
p=roots(a)
zplane(b,a)