ZDEF

[Mateus da Silva Teixeira]

Dear Jennifer,

Please, think about a situation in which you have 1,000 vertical levels.
Should I write all these 1,000 levels explicitly? Why should I made this
if there is a easier way to do the same thing?

By the way, if it should not be used, why it continues into the on-line
GrADS documentation? Remember that GrADS have a lot of new users that
use intensively that documentation and the experienced users use that as
reference.

Mateus


Jennifer M. Adams escreveu:
> 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 <mailto:jma at cola.iges.org>
>
>
>






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