average with multiple stations

[Charles Seman]

Hi Simoes,

If you have GrADS ctl files, try the following (I'm not sure that the
following will work, so please use with caution... note, by using
"define" the time becomes a "wildcard" so that different time series can
be averaged in an "ensemble" mode:
http://grads.iges.org/grads/gadoc/variable.html#new):

'set dfile (station #2 GrADS file)'
'set t 1963'
'define s2avg63 = ave(...)'

'set dfile (station #3 GrADS file)'
'set t 1963'
'define s3avg63 = ave(...)'

'set dfile (station #5 GrADS file)'
'set t 1963'
'define s5avg63 = ave(...)'

'set dfile (station #6 GrADS file)'
'set t 1963'
'define s6avg63 = ave(...)'

'set dfile (station #7 GrADS file)'
'set t 1963'
'define s7avg63 = ave(...)'

'define avg1963 = (s2avg63 + s3avg63 + s5avg63 + s6avg63 + s7avg63)/5'

and so on...

I hope this helps,
Chuck

simoes wrote:

>hi all, i have seven stations with following time series:
>
>#1 - 20 years - 1966 to 1985
>#2 - 27 years - 1963 to 1989
>#3 - 27 years - 1963 to 1989
>#4 - 24 years - 1968 to 1991
>#5 - 27 years - 1963 to 1989
>#6 - 20 years - 1963 to 1982
>#7 - 30 years - 1963 to 1992
>
>i have one value observed per year (station #1, 20 values; station #2, 27
>values...). i like to do a simple average with the available values for each
>year. examples:
>
>t = 1963
>average1963 = (#2-63 + #3-63 + #5-63 + #6-63 + #7-63) / 4
>
>t = 1991
>average1991 = (#4-91 + #7-91) / 2
>
>please, someone helps me?
>
>thanks,
>
>--
>simoes
>
>

--

********************************************************************
 Charles Seman                                charles.seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
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