[gradsusr] average of two variables

[Davide Sacchetti]

Actually i never tried ... but "modify varname seasonal" could be your
command ... see the manual
http://grads.iges.org/grads/gadoc/gradcomdmodify.html

bye bye
Davide

On Tue, 2012-10-09 at 11:18 +0200, Tobias Lundberg wrote:
> Hi all,
> 
> 
> I have to make an average of multiple time periods and I'm not sure on
> how to do this. Does anyone know how to?
> 
> 
> This is what I'd like to do,
> 
> 
> I have the monthly mean 2-m temperature from 19790101-20120101. Here
> I'd like to take the seasonal mean over dec, jan, feb, mar for the
> first ten years. Then compare it to the last ten years. It's easy to
> take the average for let's say the first winter,
> 
> 
> define t1=ave(t2m, t=12, t=15, 1)
> 
> 
> but how do I make an average if I define multiple variables just like
> the t1?
> 
> 
> 
> 
> 
> sincerely,
> 
> 
> Tobias Lundberg
> 
> 
> tobias.liljalundberg at gmail.com
> +46 733 80 27 87
> 
> 
> 
> 
> 
> 
> 
> 
> 
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-- 
--> Attenzione cambio indirizzo: davide.sacchetti at arpal.gov.it
--
Davide Sacchetti
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.gov.it     web: www.meteoliguria.it