Re: pseudo-variables

[Ansley Manke <ansley@xxxxxxxxxxxxx>]

And, I just thought of something else. You could also use
the RETURN keyword,

yes? use coads_climatology
yes? let imax = `sst,return=IEND`
 !-> DEFINE VARIABLE imax = 180

See RETURN= in the users guide for a list of all the arguments
available for RETURN.


Ansley Manke wrote:

> Hi Ufuk,
> You first need to tell Ferret which data the pseudo-variable is
> to be taken from, with I[GX=var].  Then if you try to use the @MAX
> transformation to see its maximum, you will see an error message
> and a suggestion about how to get the maximum.
>
>    yes? use coads_climatology
>    yes? LIST I[GX=sst, I=@MAX]
>     **ERROR: command syntax: cannot transform pseudo-variables: I=@MAX
>              use DEFINE VARIABLE (e.g. DEF VAR ii=i) and transform that
>
> Define a new variable to be the pseudo-variable for the data.  Now
> you can list its max.
>
>    yes? LET ii = I[GX=sst]
>    yes? LIST ii[I=@MAX]
>              VARIABLE : I[GX=SST]
>              DATA SET : COADS Monthly Climatology (1946-1989)
>              FILENAME : coads_climatology.des
>              FILEPATH : /home/ja9/tmap/fer_dsets/descr/
>              LONGITUDE: 20E to 20E(380) (maximum)
>           180.0
>
> Ufuk Utku Turuncoglu wrote:
>
> > Hi,
> >
> > How can i find max and min value of pseudo-variables (I, J, K, and L) from an
> > data set.
> >
> > best regards,
> >
> > -------------------------------------------------
> > This mail sent through IMP: http://webmail.students.itu.edu.tr/

--
Ansley Manke  Pacific Marine Environmental Laboratory  Seattle WA  (206)526-6246