Re: [ferret_users] number of opened datasets

[David Wang <dwang@xxxxxxxxxxxxxxxxx>]

Thank you, Ansley.

It's a nice workaround, providing I don't change the current dataset 
with SET DATA.

David

Ansley Manke wrote:
> Hi David,
> There isn't such a symbol, per se. (That's a good  idea though).  
> However you can get this information if you know a variable in the 
> last dataset opened, by using `var,RETURN=dsetnum`
>
>     yes? use etopo120
>     yes? use etopo60
>     yes? use etopo20
>
>     yes? let dsetnum = `rose,return=dsetnum`
>      !-> DEFINE VARIABLE dsetnum = 3
>
>
>
> David Wang wrote:
> > Hi Ferreters,
> >
> > I wonder if there is any system symbol (or means) keeping track of 
> > the number of opened datasets in the current session. I'd like loop 
> > around all datasets with the command:
> >
> > repeat/name=m/range=1:`number_of_datasets` let/data=`m` v2 = v1[t=@ave]
> >
> > without manually counting and specifying the number of datasets.
> >
> > Thanks,
> > David

--
Daiwei Wang
Department of Earth and Environmental Sciences and
Lamont-Doherty Earth Observatory
Columbia University