Re: [ferret_users] modify argument list of a variable (e.g. SSH)

[Haoping Yang <Haoping.Yang@xxxxxxxx>]

Thanks for all responses. Yes, the @ASN has solved my problem. -Haoping

Paulo B. Oliveira wrote:
> Hello Haoping,
>
> I think that the @ASN transform will work for you.
>
> Paulo
> ---------------------------------------------------
> On Tue, 2011-12-06 at 12:37 -0500, Haoping Yang wrote:
>   
> > Dear ferreters,
> >
> > Here I use a simple example to describe my problem. A netcdf dataset 
> > OLD.nc contains:
> > ------------------------------------------------------------
> > dimensions:
> >         Longitude = 271 ;
> >         Latitude = 193 ;
> > variables:
> >         float Longitude(Longitude) ;
> >         float Latitude(Latitude) ;
> >         float SSH_OLD(Latitude, Longitude) ;
> > ------------------------------------------------------------
> > yes? use OLD.nc
> > yes? show data
> >      currently SET data sets:
> >     1> ./iarchv.2011_001_00_2d.nc  (default)
> >  name     title       I         J         K         L
> >  SSH      SSH         1:271     1:193     ...       ...
> >
> >
> > Now I wanna use ferret to generate a new netcdf file NEW.nc with a new 
> > list of arguments for the variable SSH. I mean I want to simply express 
> > SSH as a function of iaxis (1,2,3,...,271) and jaxis(1,2,3,...193) to 
> > replace SSH_OLD(Latitude, Longitude):
> > ------------------------------------------------------------
> > dimensions:
> >         iaxis = 271 ;
> >         jaxis = 193 ;
> > variables:
> >         int iaxis(iaxis) ;
> >         int jaxis(jaxis) ;
> >         float SSH(jaxis, iaxis) ;
> > ------------------------------------------------------------
> >
> > I tried to use the section below but it doesn't work and gives me a file 
> > with wrong data.
> > yes? define axis/x=1:271:1 iaxis
> > yes? define axis/y=1:193:1 jaxis
> > yes? define grid/x=iaxis/y=jaxis new_grid
> > yes? let SSH=SSH_OLD[d=1,g=new_grid]
> > yes? save/file="NEW.nc" SSH
> >
> > Can anyone show me a few ferret scripts that might be able to get the 
> > expected NEW.nc?
> >
> > Many thanks!
> >
> > Haoping
> >     
>
>
>