by user158013
Last Updated December 07, 2017 09:19 AM

I am going through the examples on how to use the marima package in R provided here : http://orbit.dtu.dk/files/123996117/marima.anv.talk.pdf

"We will estimate the **four univariate** the models [...]
In order to define the model theprocedure define.model is used [...]
Using define.model the variables in the data which are irrelevant for the analyses are taken out, rem.var=c(1,6,7), and indep=c(2:5) results in the variables 2, 3, 4 and 5 being analysed **independently**. "

Later on:"We may now estimate the **general four-variate** arma(1,1) model. The only modification in comparison with the above analysis is the model (Model2) definition statement where indep=c(2:5) is taken out (indep=NULL)."

When I analyse the variables independently using arima am I evaluating a multivariate model? Or in order to evaluate a multivariate model I need the condition indep=NULL?

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