tseries (version 0.9-30)

summary.arma: Summarizing ARMA Model Fits

Description

Methods for creating and printing summaries of ARMA model fits.

Usage

## S3 method for class 'arma':
summary(object, \dots)
## S3 method for class 'summary.arma':
print(x, digits = max(3, getOption("digits") - 3),
      signif.stars = getOption("show.signif.stars"), ...)

Arguments

object

an object of class "arma"; usually, a result of a call to arma.

x

an object of class "summary.arma"; usually, a result of a call to the summary method for objects of class "arma".

digits, signif.stars

see printCoefmat.

...

further arguments passed to or from other methods.

Value

• A list of class "summary.arma".

Details

The summary method computes the asymptotic standard errors of the coefficient estimates from the numerically differentiated Hessian matrix approximation. The AIC is computed from the conditional sum-of-squared errors and not from the true maximum likelihood function. That may be problematic.

See Also

arma