Re: how to calculate average of seasonal means

To me, it is not clear what is the best approach.
We get lots of questions and we have our 'real' jobs to do.
Hence, providing a clear, concise description of the problem
and the objective facilitates getting answers.

When referring to a variable, it is always best to include the
output from (eg)

    ListSetType (f, "???") ; 'cat' (default) or 'join'

    f = addfiles("...". "r")
    w = f->WIND
    printVarSummary(w)

Are the data, 6 hourly, daily, monthly????

To what "seasons" are you referring?
eg: DJF, NDJF, ONDJF, ONDJFM, ......

D

On 10/19/2010 10:54 AM, Vishali P. wrote:
> Hi Ryan
>
> Thanks. I already used that command. I'll explain you in steps what I
> did and what I want
>
> 1. Firstly, my data are separated in files from 1998 to 2004, 2 files
> per year(one for component u and another for v)
>
> 2. I calculated (with ncl) wind speed with formula
>
> w = sqrt(u^2+v^2)
>
> 3. Created outputs of w for each year (year file is aprox 950MB)
>
> 4. Used the command 'cdo yseasmean' from CDO for each year (7 files)
>
> 5. NOW, I want to 'pick' all first season of each year to calculate
> average, then the 2nd season , then 3rd and then 4th.
>
> 6. And finaly...plot 4 graphics of sazonal mean of wind speed(1998-2004)
>
> If something is not clear...please tell.
>
> Vp
>
>
>
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Dennis J. Shea                  tel: 303-497-1361    |
P.O. Box 3000                   fax: 303-497-1333    |
Climate Analysis Section                             |
Climate & Global Dynamics Div.                       |
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