You can logically aggregate these files either with NcML or use the
handy Data Chooser option that allows you to aggregate-by-time (under
"Data Choosers", pick "Directory" type, and then in the "Data Source
Type" of that Chooser, select "Aggregate Grids by Time"...
tom
On Tue, Mar 29, 2011 at 11:08 AM, Luis Del Castillo
<luis.delcastillo@xxxxxxxxxxxx> wrote:
> Thanks Tom but since am using grads to print images and netcdf files I get
> one file every 24hr so am using 32 files. Any idea of how can I solve this.
>
> thanks
>
> -----Original Message-----
> From: Tom Whittaker [mailto:whittaker@xxxxxxxx]
> Sent: martes, 29 de marzo de 2011 10:19 a.m.
> To: Luis Del Castillo
> Cc: idvusers@xxxxxxxxxxxxxxxx
> Subject: Re: [idvusers] formula
>
> Luis --
>
> On Mon, Mar 28, 2011 at 4:41 PM, Luis Del Castillo
> <luis.delcastillo@xxxxxxxxxxxx> wrote:
>> Hi every one am writing because I'm trying to create a formula with 32
>> variables in this case is an average so I need to create a formula that adds
>> 32 variables and then divide by 32 so how could I create a formula that does
>> this.
>>
>> The main idea is that this is done with the last 32 days every day.
>
> If your source data is a single "data object" that has 32 times (days)
> of data, then you would simply write a Jython function to do the
> summing and divide, and then create a formula that calls this function
> with the data object. There is a built-in formula and function to do
> this for grids, which might work with image data (if that is what you
> have) -- take a look in the Dashboard -> Field Selector. Click
> "Formulas" under the "Data Sources" column, and then in the Fields
> column, click "Grids -> Time steps" You can then right-click on the
> "Average time steps" to see the formula. You will find that it calls
> the function "averageOverTime(field)". You can see what
> "averageOverTime()" looks like by looking in the Jython Library, under
> "System" and the "Grid routines".
>
> If you are not using grids or images, the process may be more involved
> and you would likely have to write your own function to do the
> averaging...but I hope that helps...
>
> tom
>
>
>
>
>>
>> Thanks
>>
>>
>>
>> Luis Alejandro Del Castillo Riley
>>
>> luis.delcastillo@xxxxxxxxxxxx
>>
>> Soporte de Tecnología / IT Support
>>
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>>
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>>
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>>
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>>
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>
>
>
> --
> Tom Whittaker
> University of Wisconsin-Madison
> Space Science & Engineering Center (SSEC)
> Cooperative Institute for Meteorological Satellite Studies (CIMSS)
> 1225 W. Dayton Street
> Madison, WI 53706 USA
> ph: +1 608 262 2759
>
--
Tom Whittaker
University of Wisconsin-Madison
Space Science & Engineering Center (SSEC)
Cooperative Institute for Meteorological Satellite Studies (CIMSS)
1225 W. Dayton Street
Madison, WI 53706 USA
ph: +1 608 262 2759
