User`s guide

Creating LTI Models
2-25
displays the coefficients of the numerator and denominator of the first input
channel.
ans =
0 1 –1
ans =
1 2 10
Note that the same result is obtained using
H.num{1,1}, H.den{1,1}
See “Direct Property Referencing”on page 2-33 formore information aboutthis
syntax.
To obt ain the numerator and denominator of SISO systems directly as row
vectors, use the syntax
[num,den,Ts] = tfdata(sys,'v')
For example, typing
sys = tf([1 3],[1 2 5]);
[num,den] = tfdata(sys,'v')
produces
num =
0 1 3
den =
1 2 5
Similarly,
[z,p,k,Ts] = zpkdata(sys,'v')
returns the zeros, z, and the poles, p,asvectors for SISO systems.