[R] How to analyse and model 2 time series, when one series needs to be differenced?

Bernardo Rangel Tura tura at centroin.com.br
Sun Feb 1 09:28:54 CET 2009

On Mon, 2009-01-26 at 08:52 +0000, Andreas Klein wrote:
> Hello.
> How can I analyse the cross-correlation between two time series with ccf, if one of the time series need to be differenced, so it is stationary?
> The two time series differ when in length and maybe ccf produces not the correct cross-correlation?!
> Another problem:
> How can I model the two time series as an VARI-process with the dse package? - 
> So how can I handle it, that one series has to be differenced and the other series not?
> I hope you can give me some hints.
> Regards,
> Andreas.

Hi Andreas,

If I understand your problem this script solve tour question


Bernardo Rangel Tura, M.D,MPH,Ph.D
National Institute of Cardiology

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