signal (version 1.8-0)

zplane: Pole-zero plot

Description

Plot the poles and zeros of a model or filter.

Usage

# S3 method for default
zplane(filt, a, ...)
# S3 method for Arma
zplane(filt, ...)
# S3 method for Ma
zplane(filt, ...)
# S3 method for Zpg
zplane(filt, ...)

Value

No value is returned.

Arguments

filt

for the default case, the moving-average coefficients of an ARMA model or filter. Generically, filt specifies an arbitrary model or filter operation.

a

the autoregressive (recursive) coefficients of an ARMA filter.

...

Additional arguments passed to plot.

Author

Tom Short

Details

Poles are marked with an ‘x’, and zeros are marked with an ‘o’.

References

Octave Forge https://octave.sourceforge.io/

https://en.wikipedia.org/wiki/Pole-zero_plot

See Also

Arma, freqz

Examples

filt <- ellip(5, 0.5, 20, .2)
zplane(filt)