Re: [ferret_users] climatology from different files

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Hanh,
You want to make a multi-file dataset (also called a descriptor file). 
You will create a descriptor file which lists your file names and 
information about the time steps.  Then you can open this descriptor 
file in Ferret and it will appear as a single dataset.There are tools 
for creating a descriptor file, documented here:
../../faq/using-data-that-spans-multiple-files.html#_VPINDEXENTRY_1144
The general information about this concept is here:
../../faq/using-data-that-spans-multiple-files.html

If you have trouble, please take a look at this thread, about multi-file 
datasets;
../fu_2009/msg00536.html


Then to compute the climatology, use the modulo regridding operation. 
../../documentation/users-guide/Grids-Regions/GRIDS#Chapter4-Modulo_regridding

This operation automatically takes leap years into account.

Ansley

nguyen@xxxxxxxxxx wrote:
> Hi ferreters
> I'd like to compute a daily climatology from a 1989-2009 data. I have one
> file per year (because of the BIG size of the data I can't have all years
> in one single file). Is there a easy way to obtain the climatology from
> these files, considering leap years too?
> Thanks
> Hanh
>
>