forecasting - 'forecast.Arima' function missing from'forecast' package

Question

Unable to find forecast.Arima function in forecast package. Error displayed "forecast.Arima" not found. Can forecast function be used in place of 'forecast.Arima' function ? I am using forecast 8.1.

Secondly, the output from ARIMA is flat at mean for the future dates. Is this because I am using 'forecast' function.

library(forecast)

arima.forecast <- forecast(arima1, h=30)

Answer 1

forecast.Arima is not missing, it is just not exported in v8.1+. Use forecast instead, which will call forecast.Arima when required.

Flat forecasts are common. See https://robjhyndman.com/hyndsight/flat-forecasts/