zplane {signal}

Pole-zero plot

Description

Plot the poles and zeros of a model or filter.

Usage

## Default S3 method:
zplane(filt, a, ...)

## S3 method for class 'Arma'
zplane(filt, ...)

## S3 method for class 'Ma'
zplane(filt, ...)

## S3 method for class 'Zpg'
zplane(filt, ...)

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.

Details

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

Value

No value is returned.

Author(s)

Tom Short

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)