From ignacio.diaz-emparanza@ehu.es Mon Feb 15 12:38:29 2010
From: Ignacio Diaz-Emparanza <ignacio.diaz-emparanza@ehu.es>
To: gretl-devel@gretlml.univpm.it
Subject: Re: [Gretl-devel] ema, obs and optional parameter
Date: Mon, 15 Feb 2010 18:38:28 +0100
Message-ID: <1266255508.2263.17.camel@U001082.ehu.es>
In-Reply-To: 1266227865.2244.34.camel@U001082.ehu.es
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El lun, 15-02-2010 a las 10:57 +0100, Ignacio Diaz-Emparanza escribió:
> El vie, 12-02-2010 a las 13:44 -0500, Allin Cottrell escribió:
> > On Fri, 12 Feb 2010, Ignacio Diaz-Emparanza wrote:
> > 
> > > With periodicity ($pd)> 1 (quarterly or monthly data,..)
> > > y[1] is refering to the first observation of the series,
> > > but with annual data it is refering to the observation of year '1'.
> > 
> > Duh, sorry, I wasn't paying enough attention. I'll think about it,
> > but here's a quick work-around:
> > 
> > <script>
> > open data3-6
> > series y = Ct
> > series s1 = 0
> > scalar d = 0.5
> > scalar T = $nobs
> > loop t=1..T
> >   s1[t] = (t==1) ? y[t] : d*y[t]+ (1-d)*s1[t-1]
> > endloop
> > print y s1 -o
> > </script>
> > 
> > Allin
> 
> Oh, yes it works ! I did not try with 't' because I thought it was an
> alias of 'obs', given the explanation in the function reference:
> 

Sorry I am seeing I was absolutely confused about that. I didn't notice
that you were using a loop in 't'. In general in genr commands really
't' is an alias of 'obs'. So the problem persists also with 't'.



-- 
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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