[gradsusr] Advanced Usage of Ave Function

[Jeffrey Duda]

Mason,
It sounds like you'll have to hard code the lat/lon boxes for each ave
command then.  Try something like

lat1.1 = ...
lat1.2 = ...
.
.
.
lat1.n = ...

---

lat2.1 = ...
lat2.2 = ...
.
.
.
lat2.n = ...

---

lon1.1 = ...
lon1.2 = ...
.
.
.
lon1.n = ...

---

lon2.1 = ...
lon2.2 = ...
.
.
.
lon2.n = ...

where lat1 and lat2 are the start and end latitudes of the box and lon1 and
lon2 are th start and end longitudes of the box, and n is the number of
files.  Then do

a = 1
sum = 0
while (a <= n)
 'd asum(field.'a',lon='lon1.a',lon='lon2.a',lat='lat1.a',lat='lat2.a')'
*insert commands to take the output value into a new variable called summand
  sum = sum + summand
 a = a +1
endwhile

average = sum/n

Is this what you are trying to do?

Jeff Duda

2011/8/28 Rowell, Mason D. <Mason.D.Rowell-1 at ou.edu>

>  Thank you for your response,
>
> The trouble is, I don't want the domains for each file to match. I have
> GRIB data that I have made ctl files for with grib2ctl.pl but I want to
> center each file (for a different day) on a different grid point and then
> average the files. Thus I wouldn't be averaging the same actual grid point
> in space each time.
>
> Mason
>  ------------------------------
> *From:* gradsusr-bounces at gradsusr.org [gradsusr-bounces at gradsusr.org] on
> behalf of James Ciarlo` [james.ciarlo at physics.org]
> *Sent:* Saturday, August 27, 2011 9:02 AM
> *To:* GrADS Users Forum
> *Subject:* Re: [gradsusr] Advanced Usage of Ave Function
>
>  try opening them together
>
> open file.ctl
> open file2.ctl
> open file3.ctl
> .... etc
>
> then set the domain conditions (so that they all match)
>
> then just ave. Remember to call the variables with var.1, var.2 depending
> on the file number.
>
> if you give us an example of the commands you are trying to use we can
> probably help better
>
> Regards,
>
> James
>
> 2011/8/27 zjuyanlibin <zjuyanlibin at 163.com>
>
>> **
>> convert the different domains into a same domain at first step.
>>
>>
>>
>>  ------------------------------
>>  *发件人：* Rowell, Mason D.
>> *发送时间：* 2011-08-27  04:42:50
>> *收件人：* GrADS Users Forum
>> *抄送：*
>> *主题：* [gradsusr] Advanced Usage of Ave Function
>>  All,
>>
>> Is there a way to average several different files (presumably the same variable in each file) but with a different domain setting for each file?
>>  Mason
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>>
>
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>


-- 
Jeff Duda
Iowa State University
Meteorology Graduate Student
www.meteor.iastate.edu/~jdduda <http://www.meteor.iastate.edu/%7Ejdduda>
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