[R] ARIMA models

[emj83]

is there some sort of R function which can advise me of the best ARIMA(p,q,r)
model to use based on the Schwarz criterion e.g for e.g p=0-5, q =0, r=0-5
or for example p+r< 5???

or is this something I will have to write my own code for?

Thanks Emma
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