tf2zpk
Transforms (discrete) transfer function parameters to zero-pole-gain parameters.
Syntax
[Z, P, K] = tf2zpk(NUM, DEN)
Inputs
- NUM
- The numerator polynomial coefficients.
- DEN
- The denominator polynomial coefficients.
Outputs
- Z
- The zeros of the system.
- P
- The poles of the system.
- K
- The gain factors of the system.
Example
Zero-pole-gain parameters from numerator and denominator coefficients:
num = [3 2];
den = [5 2.4 3];
sys = tf(num,den,0.2);
[z, p, k] = tf2zpk(cell2mat(sys.num),cell2mat(sys.den))z = -0.666666667
p = [Matrix] 2 x 1
-0.24000 + 0.73648i
-0.24000 - 0.73648i
k = 0.6Comments
The function returns the zero-pole-gain parameters of a discrete-time transfer function.