Hello,
This is a statistics question, not an R one.
If you want to fit an ARMA model, your time series can have any values,
zero, negative or positive. Please revise your knowledge of time series.
Hope this helps,
Rui Barradas
Em 28-02-2013 10:40, Nnina escreveu:> Hello,
> I would like to compute ARMA and AR using arima-function in R.
>
> My question is: If I have Null=zero values in my data, what should I do?
> Remove ? or doesn't matter for ARIMA-models and I can estimate my
> coefficients including zero values in data in arima-function in R ? What
> is the better way? How to manage the data for ARIMA estimation?
>
> Thank you.
>
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>
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