[gradsusr] How to use sdfwrite to get composite of data

[Kishore Ragi]

Hi,

I don't know exactly how to extract only few months but, you can extracts
data of the area you are interested as follows

sdfopen xxxx.in
set t x y
set z 1
set lon -20 20
set lat -40 20
define landprec=data_var(present file variable name)
sdfwrite landprec
undefine landprec

a datafile with grads_xxxx.nc file with your desired area is created...

Hope it reduces your problems...

Cheers,

Kishore


On Fri, Apr 19, 2013 at 2:08 PM, Martin Addi <addimartin32 at gmail.com> wrote:

> Hi to all
> i have a land precipitation data from CRU in a .nc file but i want to
> extract only the JAS(july,august and september)  from 1951-2009 within
> lat. -40 20 and lon. -20 20.I want only this data and what is the
> script or step i should use?Thank you.
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