[gradsusr] Standard deviation of an area

[David Nielsen]

Dear all grads users,

I would like to calculate the standard deviation of an area in Grads.

I have a NetCDF wekly time series of SST (attached), and I am able to
calculate the average of a certain area (defining LAT and LON) value using
the "aave" formula, for each value of time, and generate a new series - ok.
In addition to this seires, I would like to generate a series of standard
deviations of this average, also for each time in the series. In other
words, I need to to know, for a given area and time, what is the standard
deviation of my variable?

Please find attached an example of a NetCDF file I want to treat this way:
1. Calculate average of SST in a certain area (lat, lon) using aave, for
each time value
2. Calculate standard deviation of SST in a certain area (lat, lon), for
each time value

Would anybody have any kind suggestions on how to address this #2 task?

Many thanks in advance,



-- 
David Marcolino Nielsen
Engenharia de Recursos Hídricos e do Meio Ambiente
Universidade Federal Fluminense
davidnielsen at id.uff.br
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