[R] Multivariate time series

[Giusy]

Thank you very much for your answers,you are all very kind!Excuse me, can I
make another question about time series?
When I use arimaId or best.arima function in package forecast, I can't
insert regressors, I can insert them only when I make predictions..
But isn't the model influenced by regressors (for example sales are
influenced by presence of promotion)? What can I do? Do I have to clean the
data by regressors effect before using arimaId or can I use the original
data?
Thank you very much, I hope to receive  your answer..
Giusy






Giusy wrote:
> 
> Hello to everyone!
> I have a question for you..I need to predict multivariate time series, for
> example sales of 2 products related one to the other, having the 2 prices
> like inputs..
> Is there in R a function to do it? I saw dse package but I didn't find
> what a I'm looking for..
> Could anyone help me?
> Thank you very much
> Giusy
> 

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