Compute the z-plane impulse response of an ARMA model or rational IIR
filter. A plot of the impulse and step responses is generated.
Usage
impz(filt, ...)
# S3 method for impz
print(x, ...)
# S3 method for Arma
impz(filt, ...)
# S3 method for Ma
impz(filt, ...)
# S3 method for Sos
impz(filt, ...)
# S3 method for Zpg
impz(filt, ...)
# S3 method for default
impz(filt, a = 1, n = NULL, fs = 1, ...)
Value
For impz, a list of class "impz" with items:
x
impulse response signal.
t
time.
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.
...
for methods of freqz, arguments are passed to the default
method. For plot.impz, additional arguments are passed through to
plot.
x
object to be printed or plotted.
a
the autoregressive (recursive) coefficients of an ARMA filter.
n
number of points at which to evaluate the frequency response. If
n is a vector with a length greater than 1, then evaluate the
frequency response at these points. For fastest computation, n
should factor into a small number of small primes. Default: 512.
fs
sampling frequency in Hz. If not specified (default = 2 * pi), the
frequencies are in radians.