ZDEF

[Jennifer M. Adams]

If you must use 'ZDEF linear', try this:
ZDEF 19 linear 100 50
OPTIONS zrev

What's wrong with the 'ZDEF 19 levels ...' option you wrote out?
Why complain when you've got something that works?

The bugs regarding bad ZDEF entries were in the older versions that
allowed a negative or zero increment. Non-positive grid increments
cause problems in a few different places in the code, places you
might not necessarily visit during a normal GrADS session.

Jennifer

On Oct 30, 2006, at 11:41 AM, Mateus da Silva Teixeira wrote:

> Dear GrADS users,
>
> I'm not sure if it is a bug or is a problem with my CTL files, but
> always that try to use negative increments in ZDEF, like
> ZDEF 19 LINEAR 1000 -50
> I get the following error:
>
> Open Error:  Missing or invalid dimension increment value
>  --> The invalid description file record is:
>  --> ZDEF 19 LINEAR 1000 -50
>
>  The data file was not opened.
>
> But when replace the above ZDEF line by this
> ZDEF 19 LEVELS 1000 950 900 850 800 750 700 650
>            600 550 500 450 400 350 300 250 200
>            150 100
>
>
> It works. I'm using the version v1.9b4 32-bit. However, when using the
> version v1.8s11, any error do occur with negative increment in the
> CTL file.
> Is this a bug of the new version?
>
> Thanks
>
> Mateus
>
>
>
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Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Beltsville, MD 20705
jma at cola.iges.org



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