[gradsusr] Computing Mean

[Teddy Allen]

Dear Maria,
I find that many of these similar questions can be answered through the easy to use IRI Climate Library Ingrid system ( http://iridl.ldeo.columbia.edu/ ). Through the simple point and click method one can easily compute exactly what you are asking for without even writing one line of code. 
Select a dataset, apply the "Data Selection", click on "filter" to average in time, and voila...you can now download a .nc file of exactly what you are looking for to display in GrADS. Or, to make life even easier, you can display the file through the new NASA NetCDF display tool: http://www.giss.nasa.gov/tools/panoply/

I am a strong proponent of these easy to use web tools for data analysis. It allows us to spend more time analyzing rather than coding. However, GrADS still remains my coding weapon of choice for all of my computational battles. 
 
Good Luck and let me know if you have any questions.
teddy allen

http://www.teddyallen.com
"To move quickly, go alone. To move far, go together." 
African Proverb


________________________________
From: Maria Tembo <mariatembo at aol.com>
To: gradsusr at gradsusr.org 
Sent: Tuesday, January 10, 2012 9:51 AM
Subject: [gradsusr] Computing Mean


I have a question which seems kind of easy, but right now my brain canot figure this out. I have a file with 10yrs and 3 months ie, 1980-1990 for May, June, July. When i use 

ga> ave(lon,lat).. what is computed is an average for all the 30 time steps, which is ok

But what do i do then if i want to average everything in this particular file to get only one mean, in terms of lat and lon such that i can draw a spatial map?

Thanks in advance for the valued responses

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