Re: how extract a smaller array from the mother array according the lat and lon information?

Hi Tang,

Try to do this:

partt_var = grb_file->TMP_3_SFC_10({sty:edy},{stx:edx})

Always that you use the coordinates to get a small part of an array, you
should put that information between {}. Please, take a look at
http://www.ncl.ucar.edu/Document/Manuals/Ref_Manual/NclVariables.shtml#Subscripts

Also, I think that you cannot use dimension names when get data directly
from files, as you are trying.

Best regards,

Mateus

2010/7/3 Jie TANG <totangjie@gmail.com>

> hi,every one .
> now I want to write a ncl script that get a smaller region dataset from
> the global fnl dataset (dss083.2 )..
>
> stx=20 ; stx is the start dimension of lon
> edx=40 ; edx is the end dimension of lon
> sty=80 ; sty is the start dimension of lat
> edy=120 ; edy is the end dimension of lat
> partt_var = grb_file->TMP_3_SFC_10(sty:edy,stx:edx) ;extract the dataset
>
> it seems that partt_var can get the(20:40,80:120) child array of
> grb_file->TMP_3_SFC_10
>
> Now I want to extract the child array according the lat and lon index
> information directly,
> How can I do it?
> I do this
> stx=100 ; stx is the start lon degree
> edx=140 ; edx is the end lon degree
> sty= 20,5 ; sty is the start lat degree
> edy=41,5 ; edy is the end lat degree
> partt_var = grb_file->TMP_3_SFC_10(lat_3|sty:edy,lon_3|stx:edx) ;extract
> the dataset
>
> when I write the script shown as above,it shows error and said that can not
> use it.
>
> how to modify the script ?
> thank you.
>
> --
>
>
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-- 
Mateus da Silva Teixeira
Registered Linux User #466740 (http://counter.li.org/)

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Received on Sat Jul 3 10:04:58 2010