>> b=[1 1] b = 1 1
>> a=[1 -1 0.5] a = 1.0000 -1.0000 0.5000NOTE: if, for example the middle coef. was zero, you still have to enter it as zero, you should not ignore it otherwise the denominator will only be first order.
>> [z,p]=tf2zp(b,a) z = -1 p = 0.5000 + 0.5000i 0.5000 - 0.5000iwhere z and p are the vectors representing the zeros and poles of the system, respectively.
>> [R,P,K]=residuez(b,a) R = 0.5000 - 1.5000i 0.5000 + 1.5000i P = 0.5000 + 0.5000i 0.5000 - 0.5000i K = The above is equivalent to