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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
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 >> >> CATHALAC >> >> www.cathalac.org >> >> Tel: (507)317-3235 (directo) >> >> Tel: (507)317-3200 (Central Telefónica) >> >> Fax: (507)317-3299 >> >> 111 Ciudad del Saber, Clayton, Panamá >> >> Apartado 0843-03102, Panamá >> >> >> >> _______________________________________________ >> idvusers mailing list >> idvusers@xxxxxxxxxxxxxxxx >> For list information, to unsubscribe, visit: >> http://www.unidata.ucar.edu/mailing_lists/ >> > > > > -- > 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
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