## S3 method for class 'default':
zplane(filt, a, \ldots)
## S3 method for class 'Arma':
zplane(filt, \ldots)
## S3 method for class 'Ma':
zplane(filt, \ldots)
## S3 method for class 'Zpg':
zplane(filt, \ldots)
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.
Value
No value is returned.
Details
Poles are marked with an `x', and zeros are marked with an `o'.