concatenate defined fields in time

[Davide Sacchetti]

On Wed, 2009-11-25 at 14:49 +0100, Stefano Materia wrote:
> Thanks to whoever replied to my question.
> The solution that Davide and James suggested seems good, but
> unfortunately the function skip does not seem to work (GrADS 2.0a7.1).
> When I do:
>
> set t 1 600
> define aa = skip (prec,12)

it does not work for define, it should just work for visualization (I
mean: you should be able to see the graph)

> "aa" has got 600 timesteps instead of 600/12=50, and does not represent
> the values I expect. Even the first timestep of "aa" is different from
> the first timestep of "prec".
>
> Any further help is appreciated.
> Thanks very much.
>
>
> Davide Sacchetti ha scritto:
> > concatenating defined fields it's hard
> > but you may have other chances
> > If I understood correctly your data contain monthly time series for 50
> > years, then your ctl should have a line like:
> >         tdef 600 linear datestart 1mo
> >
> > if you want to see just januaries you could do:
> >         set t 1 last
> >         set missconn on
> >         display skip(variable,12)
> >
> > to see februaries:
> >         set t 2 last
> >         ...
> >
> > If this could not help, on my opinion the best thing could be to divide
> > januaries from februaries in different files
> >
> > Have a nice day
> >
> >
> > Davide
> >
> > On Tue, 2009-11-24 at 18:36 +0100, Stefano Materia wrote:
> >
> >> Hello,
> >>
> >> I have .ctl file with a monthly time series of 50 years, and I'd like to
> >> make time series for each month. Namely, I want one variable to loop
> >> through the 50 januaries, one to loop through the 50 februaries, etc.
> >>
> >> example:
> >>
> >> define jan1=field(t=1) "january of year #1" define jan2=field(t=13)
> >> "january of year #2" ... ...
> >>
> >> How can I define totjan = jan1 & jan2 & ......
> >>
> >> so that
> >>
> >> set t 1 50 d totjan
> >>
> >> allows looping through jan1, jan2, etc... ? Is it possible to do that?
> >>
> >> Many thanks, Stefano
> >>
> >> --
> >>
> >> ---- PLEASE NOTE THE CHANGE OF EMAIL ADDRESS ----
> >>
> >> Stefano Materia - PhD
> >> CMCC - Centro Euro-Mediterraneo per i Cambiamenti Climatici
> >> Viale Aldo Moro, 44 - 40127 Bologna (ITA)
> >> tel. +390513782676, fax +390513782655
> >> stefano.materia at cmcc.it
> >>
> >> -------------------------------------------------
> >>
> >>
> > --
> > Sacchetti Davide
> > Centro Funzionale Meteo Idrologico di Protezione Civile della Regione Liguria
> > ARPAL Unit�  Tecnica Complessa di livello Regionale
> > V.le Brigare Partigiane 2 16121 Genova (I)
> > tel: +39 010 6437535                    fax: +39 010 6437520
> > mail: davide.sacchetti at arpal.org     web: www.meteoliguria.it
> >
>
> --
> ---- PLEASE NOTE THE CHANGE OF EMAIL ADDRESS ----
>
> Stefano Materia - PhD
> CMCC - Centro Euro-Mediterraneo per i Cambiamenti Climatici
> Viale Aldo Moro, 44 - 40127 Bologna (ITA)
> tel. +390513782676, fax +390513782655
> stefano.materia at cmcc.it
>
> -------------------------------------------------
>
--
Sacchetti Davide
Centro Funzionale Meteo Idrologico di Protezione Civile della Regione Liguria
ARPAL Unità Tecnica Complessa di livello Regionale
V.le Brigare Partigiane 2 16121 Genova (I)
tel: +39 010 6437535                    fax: +39 010 6437520
mail: davide.sacchetti at arpal.org     web: www.meteoliguria.it