ARIMA function doesn't work without specifying parameters

[emilyS2015]

Hi,

I tried the ARIMA function in the fable package and the results return to Null, but the ETS function works:

data%>%model(arima=ARIMA(price), ets=ETS(price))%>%forecast(h=6)

But only if I specify the ARIMA function with parameters, the ARIMA function works, for example:

data%>%model(arima=ARIMA( price~ 0 + pdq(0, 1, 1) + PDQ(0, 1, 1), ets=ETS(price))%>%forecast(h=6)

Do you know why? I'm using the newest version of fable package 0.3.1.

Thanks!

[mitchelloharawild]

Are you able to provide the data object so that I can reproduce this issue? The issue may be related to having weekly data.

[emilyS2015]

Hi Mitchell,

Thanks for the quick reply. Sorry that I can't provide the 'data' object because it's private data, but I tried the same function on the public data in the tsibbledata library and found the same issues.

Thanks a lot!