how to specify bndecomp.src arma(p,q)

Questions and discussions on Time Series Analysis
hardmann
Posts: 252
Joined: Sat Feb 26, 2011 9:49 pm

how to specify bndecomp.src arma(p,q)

Unread post by hardmann »

Dear Tom

Before I decompose lgdp series by @bndecomp.src, I should rightly test ARIMA form of lgdp. However, I get ar=3 ma=1, which is refused by @bndecomp. It responese that ar should be between 0 - 2.

Best regards.

hardmann
Last edited by hardmann on Mon Feb 20, 2012 3:15 am, edited 3 times in total.
TomDoan
Posts: 7814
Joined: Wed Nov 01, 2006 4:36 pm

Re: how to specifu bndecomp.src arma(p,q)

Unread post by TomDoan »

Not with any version of BNDECOMP that we've had in at least ten years.
hardmann
Posts: 252
Joined: Sat Feb 26, 2011 9:49 pm

Re: how to specify bndecomp.src arma(p,q)

Unread post by hardmann »

bndecomp.src had been revised in 2005,2006,2007.
I want to learn BN decom.

Best Regard.

Hardmann
TomDoan
Posts: 7814
Joined: Wed Nov 01, 2006 4:36 pm

Re: how to specify bndecomp.src arma(p,q)

Unread post by TomDoan »

The error message presumably was that the sample range was wrong, not that the AR parameters were wrong. If you use AR=3, you need the start parameter to be at least 4.

The one example we have that uses this is endersp252.rpf from the Enders textbook examples. That both does the BN decomposition by working out the calculations, and also by using BNDECOMP.
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