Re: [ferret_users] Calculations between different time axis

[Xuebin Zhang <xbzhang@xxxxxxxx>]

Paulo,

  You may try "regridding" transformation.  You can just define a new 
time axis, then regrid results from different years onto that new time 
axis.

   For example, you want to compare outputs from two different years 
(var1 for one year output, var2 for the other year, they have same xyz 
grids) :

in Ferret:
!!!!!!!!
! define a new time axis tax1
def axis/t=""  tax1
! regrid var1, var2
let var1_new=var1[gt=tax1@asn]
let var2_new=var2[gt=tax1@asn]
!!!!!!!!

Now var1_new and var2_new can be directly compared (since they have the 
same xyzt grids).  Should be careful with @asn transformation, since 
it's blind association.

For your reference.

Xuebin


Paulo Santiago wrote:
> Hi Ferreters,
>
> I would like to calculate the differences between data with different 
> time axis.
>
> The data are results from the same model (same xyz grid) for different 
> years.
>
> I believe there's a simple and elegant way to do this task with 
> Ferret, but I can't imagine how.
>
> Thanks in advance.
>
> --
> Paulo Santiago


--
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* Xuebin Zhang (PhD)                      *
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