## S3 method for class 'Arima':
forecast(object, h=ifelse(object$arma[5]>1,2*object$arma[5],10),
level=c(80,95), fan=FALSE, xreg=NULL,...)
## S3 method for class 'ar':
forecast(object, h=10, level=c(80,95), fan=FALSE, ...)
xreg
is used, h is ignored and the number of forecast periods is set to the number of rows of xreg.Arima
objects only).forecast
".
The function summary
is used to obtain and print a summary of the
results, while the function plot
produces a plot of the forecasts and prediction intervals.
The generic accessor functions fitted.values
and residuals
extract useful features of
the value returned by forecast.Arima
.
An object of class "forecast
" is a list containing at least the following elements:object
itself or the time series used to create the model stored as object
).predict.arima
or predict.ar
and constructs an object of class "forecast
" from the results.predict.arima
, ar
, arima
, rwf
.fit <- Arima(WWWusage,c(3,1,0))
plot(forecast(fit))
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