Zero-pole plot
Plot the poles and zeros of a filter or model on the complex Z-plane
zplane(filt, ...) ## S3 method for class 'Arma' zplane(filt, ...) ## S3 method for class 'Ma' zplane(filt, ...) ## S3 method for class 'Sos' zplane(filt, ...) ## S3 method for class 'Zpg' zplane(filt, ...) ## Default S3 method: zplane(filt, a, ...)
filt |
for the default case, the moving-average coefficients of an ARMA
model or filter. Generically, |
... |
additional arguments are passed through to plot. |
a |
the autoregressive (recursive) coefficients of an ARMA filter. |
Poles are marked with an ‘x’, and zeros are marked with an ‘o’.
No value is returned.
When results of zplane are printed, plot will be called.
As with lattice plots, automatic printing does not work inside loops and
function calls, so explicit calls to print or plot are needed there.
Paul Kienzle, pkienzle@users.sf.net,
Stefan van der Walt stefan@sun.ac.za,
Mike Miller.
Conversion to R by Tom Short,
adapted by Geert van Boxtel, gjmvanboxtel@gmail.com
## elliptic low-pass filter elp <- ellip(4, 0.5, 20, 0.4) zplane(elp)
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