polezero: Pole-zero Plots
In phonTools: Tools for Phonetic and Acoustic Analyses

Description Usage Arguments Details Author(s) References Examples

Generate a Pole-zero plot from filter coefficients.

1	polezero (b, a, ...)

`b`	The filter moving-average (MA) coefficients.
`a`	The filter autoregressive (AR) coefficients.
`...`	Additional parameters are passed to the internal call of plot().

This function plots filter poles (x) and zeros (o) based on the given coefficients.

Santiago Barreda <sbarreda@ucdavis.edu>

http://en.wikipedia.org/wiki/Pole

## example of a typical single-zero preemphasis filter
a = 1
b = c(1, -.94)
polezero (b, a)

#example of a complex-pole formant-style filter
a = c(1, -.3, .2)
b = c(1)
polezero (b, a)