Thanx  Ignacio,

Indeed, your script works fine whatever the time series frequency may be.

That points out another question: why is the same script <genr D = (t > "2005:01")> working in monthly and quaterly data but failing in annual data ? As long as we deal with time series it should result to the same behavior regardless of the frequency.

best,

artur

> Message du 26/07/10 09:57
> De : "Ignacio Diaz-Emparanza"
> A : "Gretl list"
> Copie à :
> Objet : Re: [Gretl-users] genr dummy on annual data
>
>
> artur bala escribió:
> > Hello,
> > On an annual dataset spanning from 1970 to 2010, I want to create a
> > dummy valid from 2005 and on.
> > I tried the following command line :
> > * genr D = (t > "2005")*
> > but the newly created variable D has zeros only. Same result through the
> > GUI.
> > Note that this script does work fine for a monthly dataset (let's say
> > *genr D = (t > "2005:01")*).
> > best,
> > artur
> >
>
> Artur,
>
> for annual data, "t" and "obs" refers to the 1-entry index. Thi is
> exactly the same as if you put a single number, genr D= t>2005, with
> quarterly or monthly data. This is indicating the observation at the
> 2005th place in the series. For the behaviour that you want, you should use
>
> genr D = (t > obsnum(2005))
>
> (see discussion in gretl-dev list some months ago, initiated at the
> message:
> http://lists.wfu.edu/pipermail/gretl-devel/2010-February/002461.html )
>
>
> --
> Ignacio Diaz-Emparanza
> DEPARTAMENTO DE ECONOMÍA APLICADA III (ECONOMETRÍA Y ESTADÍSTICA)
> UPV/EHU Avda. Lehendakari Aguirre, 83 | 48015 BILBAO
> T.: +34 946013732 | F.: +34 946013754
> www.ea3.ehu.es
>
>
>
>
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