phonTools (version 0.2-2.1)

polezero: Pole-zero Plots

Description

Generate a Pole-zero plot from filter coefficients.

Usage

polezero (b, a, ...)

Arguments

b

The filter moving-average (MA) coefficients.

a

The filter autoregressive (AR) coefficients.

...

Additional parameters are passed to the internal call of plot().

Author

Santiago Barreda <[e-mail]>

Details

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

References

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

Examples

## 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)