gsignal (version 0.3-1)

zplane: Zero-pole plot

Description

Plot the poles and zeros of a filter or model on the complex Z-plane

Usage

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

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.

...

additional arguments are passed through to plot.

a

the autoregressive (recursive) coefficients of an ARMA filter.

Value

No value is returned.

Details

Poles are marked with an <U+2018>x<U+2019>, and zeros are marked with an <U+2018>o<U+2019>.

References

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

See Also

freqz

Examples

# NOT RUN {
## elliptic low-pass filter
elp <- ellip(4, 0.5, 20, 0.4)
zplane(elp)

# }