zpk
Compute zeros, poles, and gain of rational object
Description
Examples
Zeros, Poles, Gain, and DC Gain of Fit
Create an S-Parameters object from the file named default.s2p
. Perform rational fitting of the S-Parameters.
S = sparameters('default.s2p'); fit = rational(S,Display='plot')
fit = rational with properties: NumPorts: 2 NumPoles: 52 Poles: [52x1 double] Residues: [2x2x52 double] DirectTerm: [2x2 double] ErrDB: -22.6872
Calculate the zeros, poles, gain, and DC gain of the rational object.
[z,p,k,dcgain] = zpk(fit)
z=2×2 cell array
{51x1 double} {51x1 double}
{51x1 double} {51x1 double}
p=2×2 cell array
{52x1 double} {52x1 double}
{52x1 double} {52x1 double}
k = 2×2
1010 ×
1.0544 -0.0194
0.9158 0.0377
dcgain = 2×2
0.1289 -0.0838
-0.1209 0.7649
Input Arguments
fit
— Rational fit
rational
object | rfmodel.rational
object
Rational fit, specified as a rational
or rfmodel.rational
object.
Output Arguments
z
— Zeroes of fit
1-D array of doubles | 3-D array of doubles
Zeroes of the fit, returned as a 1-D array of doubles or a 3-D array of doubles.
p
— Poles of fit
1-D array of doubles | 3-D array of doubles
Poles of the fit, returned as a 1-D array of doubles or a 3-D array of doubles.
k
— Gain of fit
2-D array of doubles
Gain of the fit, returned as a 2-D array of doubles. k
is the coefficient of the rational function when poles and zeros are
expressed as monic polynomials in S
.
dcgain
— DC gain of fit
2-D array of doubles
DC gain of the fit, returned as 2-D array of doubles for zero frequency response.
Version History
Introduced in R2020a
See Also
Ouvrir l'exemple
Vous possédez une version modifiée de cet exemple. Souhaitez-vous ouvrir cet exemple avec vos modifications ?
Commande MATLAB
Vous avez cliqué sur un lien qui correspond à cette commande MATLAB :
Pour exécuter la commande, saisissez-la dans la fenêtre de commande de MATLAB. Les navigateurs web ne supportent pas les commandes MATLAB.
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
How to Get Best Site Performance
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)