Signal Processing Toolbox |
Convert zero-pole-gain filter parameters to transfer function form
Syntax
Description
zp2tf
forms transfer function polynomials from the zeros, poles, and gains of a system in factored form.
[b,a]
finds a rational transfer function =
zp2tf(z,p,k)
given a system in factored transfer function form
Column vector p
specifies the pole locations, and matrix z
specifies the zero locations, with as many columns as there are outputs. The gains for each numerator transfer function are in vector k
. The zeros and poles must be real or come in complex conjugate pairs. The polynomial denominator coefficients are returned in row vector a
and the polynomial numerator coefficients are returned in matrix b
, which has as many rows as there are columns of z
.
Inf
values can be used as place holders in z
if some columns have fewer zeros than others.
Algorithm
The system is converted to transfer function form using poly
with p
and the columns of z
.
See Also
sos2tf
, ss2tf
, tf2zp
, tf2zpk
, zp2sos
, zp2ss
zp2ss | zplane |
© 1994-2005 The MathWorks, Inc.