[R-SIG-Finance] Simulating VAR model (re-post)
Ron_M
ron_michael70 at yahoo.com
Wed Mar 31 10:28:06 CEST 2010
Thanks for this mail. In the documentation of ?ARMA following definition for
"TREND" is given :
"The name of last term, ‘TREND’, is misleading. If it is NULL
it is treated as zero. If it is a p-vector, then this constant
vector is added to the the p-vector ‘y(t)’ at each period. For
a stable model this would give the none zero mean, and might more
appropriately be called the constant or intercept rather than
trend. If the model is for differenced data, then this mean is the
trend of the undifferenced model. The more general case is when
‘TREND’ is a time series matrix of the same dimension as
‘y’. In this case it is added to ‘y’. This allows for a
very general deterministic component, which may or may not be a
traditional trend."
>From this write-up what I understood is I can treat the constant_term as
trend. Or I messed-up?
Thanks,
--
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