[gradsusr] define variable independent of time

[Ricardo Hallak]

Dear Bernd,

I would use the fwrite command:

For each computation, you can fwrite the new defined fields in a single binary file, if they have the same horizontal dimensions. With an appropriate ctl that describe correctly the new binary file as the defined fields were at the same time, you can do calculations.

Ricardo

On Sat, 10 Sep 2011 09:30:06 +0100, Becker, Bernd wrote
> Thanks Arlindo,
>  
> That would be nice for single numbers.
>  
> It as one notch more elaborate:
>  
>   'set dfile 2'
>   'set t 2  33'
>   'define obs     = 'var'.2'
> 
>  'set dfile 3'
>   'set t 2  33'
>  'define fx     = 'var'.3'
> 
> file 2 and 3 have different time frames.
>  
> d fx-obs 
>  
> fails. 
> And it would be a real bummer to have to calculate the times from one file relative
> to the other file.
>  
> Compositing in this way would be really hard. 
>  
> Enjoy the weekend!
> Bernd.
>  
> --
> Bernd Becker   Climate Impacts Product Development
> Met Office Hadley Centre    FitzRoy Road Exeter   Devon EX1 3PB  United Kingdom
> Tel.: +44 (0) 1392 884511 Fax: +44 (0)870 900 5050
> E-mail:bernd.becker at metoffice.gov.uk - http://www.metoffice.gov.uk/research/our-scientists/seasonal-to-decadal/bernd-becker
> http://www.metoffice.gov.uk/news/releases/archive/2011/weather-game
> 
>  
> 
> 
-----------------------------------------------------------------------
From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Arlindo da Silva
> Sent: 09 September 2011 17:40
> To: GrADS Users Forum
> Subject: Re: [gradsusr] define variable independent of time
> 
> 
> On Fri, Sep 9, 2011 at 12:05 PM, Becker, Bernd <bernd.becker at metoffice.gov.uk> wrote:
> 
> 
> Simple question,
> complicated answer:
> 
> I would like to composite stuff from several  files.
> 
> Each file has its own time and date info in its own .ctl file.
> 
> How can I add elements from different such files?
> 
> How can I break away from the strict treatment of the time dimension in
> grads?
> 
> open file1.ctl
> define a=ave(b,t=1,t=34)
> close 1
> open file2.ctl
> define c= ave(b,t=3,t=9)
> close 2
> etc.
> 
> d a+c
> Cannot contour grid - all undefined values
> 
> 
> 
> Try:
> 
> d a(t=1)+c(t=1)
> 
> -- 
> Arlindo da Silva
> dasilva at alum.mit.edu

 
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