[gradsusr] how to make a composite

[Ricardo Hallak]

Hi Amina,
let me add some information: a "composite" is an average over selected cases. In general, these cases are similar (for example: different times, same area, similar cases). If you compute the average using ALL 10 years, it is just a kind of "climatology" (something as a long-term average). That is, there is a subtil difference between "composite" and "long-term average".

Hope this helps,
Ricardo

----- Mensagem original -----
| Hi Amina,
| 
| I don’t know your specifics, but a composite is very often a time
| average.
| 
| You can make this in GrADS using the ‘ave’ function:
| http://www.iges.org/grads/gadoc/gradfuncave.html
| 
| Andrew
| 
| > On Oct 21, 2015, at 1:18 PM, Amina Khan <k.amina93 at yahoo.com>
| > wrote:
| > 
| > Hi,
| > 
| > I want to generate a composite of 10 years precip data.
| > Is composite an average of the data or something else?
| > How can I make this in grads or cdo.
| > Please guide me.
| > Thanks
| > 
| > Regards
| > Amina
| > _______________________________________________
| > gradsusr mailing list
| > gradsusr at gradsusr.org
| > http://gradsusr.org/mailman/listinfo/gradsusr
| 
| 
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-- 
Prof. Ricardo Hallak
Laboratório de Meteorologia de Mesoescala - LMM
Departamento de Ciências Atmosféricas
Instituto de Astronomia, Geofísica e Ciências Atmosféricas
Universidade de São Paulo

Phone: +55(11)3091-4698