Hi!
I have problems with the function arima(), it takes too much time to run
(15 minuts) it is normal?????
for example I put:
a<-arima(d7,c(0,0,5),seasonal=list(order=c(0,1,2),period=7))

where d7 is a daily time serie  with 3600 observations

Are there another function to modelize 2 seasonalities  at the same time?

another question :

When I add a matrix to regresion the function arima()  shows an error :

Erro en optim(init[mask], armaCSS, method = "BFGS", hessian = FALSE,  :
        valor no finito provisto por optim

what happen?
how can I do to regres a matrix with artificial variables in the model
sarima?

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