[gradsusr] Mean of specific time

[Rafanoharana Serge Claudio]

Dear Arlindo,

Thank you for your answer.

Serge

On Wed, Sep 28, 2011 at 4:37 PM, Arlindo da Silva <dasilva at alum.mit.edu>wrote:

>
>
> On Wed, Sep 28, 2011 at 1:29 PM, Rafanoharana Serge Claudio <
> rafanoharana at gmail.com> wrote:
>
>> Dear all,
>>
>> How to get the mean of a specific time. I mean I have monthly data of 10
>> years. I need to obtain the mean of each month. I used 'cdo -r ymeanmonth
>> input.nc output.nc' but my computer says cannot allocate memory since the
>> file is pretty big in size (20 Gb)
>>
>> Then I tried to use GrADS but cannot find the appropriate command.
>> I will take one by one the mean of each month, so for example for october
>>
>> if I do define oct=mean (var, t=1, t=12) it will give me the mean of 12
>> month but I do not need that but I need the mean of all october of 10 years
>> of the monthly data of 10 years.
>>
>> How to get each october?
>> Something like  'define
>> oct=mean(var,t=10,t=22,t=34,t=46,t=58,t=71,t=83,t=95,t=107,t=119)
>>
>>
> Did you consult the documentation for ave()<http://grads.iges.org/grads/gadoc/gradfuncave.html>?
> It explicitly says that you can specify a time increment when time
> averaging,
>
>   oct = ave(var,t=10,t=119,12)
>
> The time increment is 12 in this case.
>
>    Arlindo
>
> --
> Arlindo da Silva
> dasilva at alum.mit.edu
>
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>


-- 
Serge
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