[R] AR vs ARMA model

[Soham]

Hi I am trying to fit a time series data.It gives a AR(2) model using the ar
function and ARMA(1,1) model using autoarmafit function in timsac
package.How do I know which is the correct underlying model? pls help 



--
View this message in context: http://r.789695.n4.nabble.com/AR-vs-ARMA-model-tp4639015.html
Sent from the R help mailing list archive at Nabble.com.