[gradsusr] extract values from function

RafaelCB rafael.ciram at gmail.com
Tue Nov 6 05:31:51 EST 2012


Example:
'define var1=max(max(var,lon=xx.x,lon=xx.x),lat=yy.y,lat=yy.y)'
'define var2=min(min(var,lon=xx.x,lon=xx.x),lat=yy.y,lat=yy.y)'
max and min area.
Was this what you want?

Regards,

*Rafael Censi Borges
Meteorologia - Epagri/Ciram
+55 (48)3665-5130
http://ciram.epagri.sc.gov.br*


2012/11/6 Tobias Lundberg <tobias.liljalundberg at gmail.com>

> Sorry! I already have a script calculating the trend/month in each grid.
> So as I take the aave(trend) I get the trend of the domain I define.
> However, I'd like to calculate the derivative of this trend line, over
> time, not only show it in a plot. So if I just could extract the max and
> min value that would be fine, but if there is a command that could do the
> same, that would be even better.
>
>
> Regards,
>
> Tobias Lundberg
>
> tobias.liljalundberg at gmail.com
> +46 733 80 27 87
>
>
>
>
>
> 5 nov 2012 kl. 22:29 skrev Jeff Duda <jeffduda319 at gmail.com>:
>
> When you say "trend", do you mean time derivative?  Over what domain do
> you want to find the max and min?  If it's a spatial domain, there is a
> well known set of script command lines that can find an areal max for you.
> It's not one of the built-in functions of Grads, though.
>
> Jeff
>
> On Mon, Nov 5, 2012 at 3:20 PM, Tobias Lundberg <
> tobias.liljalundberg at gmail.com> wrote:
>
>> Hi all,
>>
>> I have a function describing the trend of the 2-m temperature. If I use
>> the gxout stat, I can get the max and min values. But is it possible to do
>> this automatically in any way.
>>
>> Like,
>> define function_max=Max
>> define function_min=Min
>>
>> Does anyone know? Or even better would be if there is a way to calculate
>> the derivative of the trend line which is plotted?!
>>
>>
>>  best regards,
>>
>> Tobias Lundberg
>>
>> tobias.liljalundberg at gmail.com
>> +46 733 80 27 87
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>>
>
>
> --
> Jeff Duda
> Graduate research assistant
> University of Oklahoma School of Meteorology
> Center for Analysis and Prediction of Storms
>
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