Dmitriy Dmitriy - 3 months ago 5
R Question

How to obtain model information from forecast package

I have a little stupid question about

forecast
package. I want to get information about model formula. For example:

library(forecast)
fit <- auto.arima(WWWusage)
print(fit)


This produces:

Series: WWWusage
ARIMA(1,1,1)

Coefficients:
ar1 ma1
0.6504 0.5256
s.e. 0.0842 0.0896

sigma^2 estimated as 9.995: log likelihood=-254.15
AIC=514.3 AICc=514.55 BIC=522.08


So in this case I can see that the model is
ARIMA(1,1,1)
. But I can't find how to extract this directly.

Answer
library(forecast)
fit <- auto.arima(WWWusage)
as.character(fit)