Hi,

I want to model different timeseries with ARMAX models in R because I think
that ARMAX models will map best to these data.
Besides I don't want to use the order of the AR or MA part but the lag  e.g.
AR Part =ar1, ar2, ar7; MA Part =ma1, ma3 and I want to use exogenous
variables as well.
I coudn't find any solutions in the R help and therefore I want to ask all
of you.
Does anyone know how to solve this problem???

That would be great! Thanks a lot for your help!!
Best regards,
Katharina

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