# Re: Problem of longitudinal cyclicity.

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Hi Dr. Hankin,
Dr. Manke.
All the best,
Neven

On Tue, 1 May 2001, Steve Hankin wrote:

> Hi Neven,
>
> A first guess is that the data set does not contain an attribute to tell
> Ferret that the longitude axis is "modulo". Try the command
>     yes? SHOW GRID
> The "m" on the X axis indicates that it is modulo.
>
>      yes? show grid sst
>       name       axis              # pts   start                end
>       COADSX    LONGITUDE          180mr   21E                  19E(379)
>
>       COADSY    LATITUDE            90 r   89S                  89N
>
> If the "m" is missing, you can tell Ferret that the axis is modulo with this
> command:
>
>     yes? SET AXIS/modulo <axis_name>
>
> You can insert the longitude axis_name of your variable automatically with
> the syntax
>     `my_variable,return=xaxis`
>
>     - steve
>
> ----------------------------------
>
> "Neven S. Fuckar" wrote:
>
> > Howdy ferreters,
> > I'm working on one global data set (I=1:181, J=1:64, ...).
> > Problem is when I want to make figure of Atlantic, let say SST from 75
> > west to 25 east (set region/x=75W:25E/...). Ferret simple chops it at the
> > zero meridian, i.e. plots STT from 75 west to Greenwich prime meridian.
> > To me it looks like Ferret have problem with cyclicity of this data.
> > I would appreciate any explantion or suggestion of how to make Ferret to
> > include on figure also an area on the left side of the prime meridian.
> > All the best,
> > Neven
> >
> > -------------------------------
> > Neven Stjepan Fuckar
> > Texas A&M University
> > Department of Oceanography
> > College Station
> > TX 77843-3146, USA
> > phone: 1-979-845-3238
> > -------------------------------
>
> --
> Steve Hankin
> NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-0070
> ph. (206) 526-6080 -- FAX (206) 526-6744
>
>
>

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