Dimension Error: What does it mean???

[Jennifer Adams]

Ah, now I see. You've got precision errors because your grid is 112 x
112 and covers an area approximately 0.25 degrees square -- that's a
very high resolution grid! Forget version 1.8, skip version 1.9, and
start using version 2.0 (with double precision handling) to represent
this data properly.
Jennifer

On Nov 10, 2008, at 8:30 AM, Mald MM5 wrote:

> Hi there,
>
> When I do 'set x 36' it still does the same giving me the same error:
>
> ga-> set X 36
> LON set to 73.542 73.542
> ga-> d w
> Data Request Error: Invalid grid coordinates
>   World coordinates convert to non-integer grid coordinates
>     Variable = w  Dimension = 0
>   Error ocurred at column 1
> DISPLAY error:  Invalid expression
>   Expression = w
>
> my 'q dims' now is:
> ga-> q dims
> Default file number is: 1
> X is fixed     Lon = 73.542  X = 36.0016
> Y is fixed     Lat = 1.8964  Y = 63
> Z is fixed     Lev = 1000  Z = 2
> T is varying   Time = 18Z11JAN2006 to 18Z12JAN2006  T = 1 to 25
>
> For some reason even though I do a 'set x 36' it takes x=36.0016
> not as a whole integer...is there anything to do with the version
> am using..Am using version 1.8SL11
>
> Thanks
> Mald
>
>
> On Mon, Nov 10, 2008 at 5:47 PM, Jennifer Adams <jma at cola.iges.org>
> wrote:
>
> On Nov 9, 2008, at 11:59 PM, Mald MM5 wrote:
>
>> Hi there,
>>
>> I am trying to generate a time-series plot at a single point from
>> a WRF output file. The grid dimensins are X,Y=112  points and Z is
>> 32 levels. After opening the file, "q dims" gives the following.
>>
>> ga-> q dims
>>
>> Default file number is: 1
>> X is varying Lon = 73.465 to 73.7092 X = 1.00002 to 112.001
>> Y is varying Lat = 1.76 to 2.0042 Y = 1.00002 to 112
>> Z is fixed Lev = 0.01 Z = 1
>>
>> T is fixed Time = 18Z11JAN2006 T = 1
>>
>> Then I set the environment to a single point. Now the "q dims" give:
>>
>> ga-> q dims
>> Default file number is: 1
>> X is fixed Lon = 73.542 X = 36.0016
>> Y is fixed Lat = 1.8964 Y = 63
>> Z is fixed Lev = 0.015 Z = 2
>> T is varying Time = 18Z11JAN2006 to 18Z12JAN2006 T = 1 to 25
>>
>> Then I issued the command to get the vertical velocity time series
>> as "d w" and it gives:
>>
>> ga-> d w
>> Data Request Error: Invalid grid coordinates
>>   World coordinates convert to non-integer grid coordinates
>>   Variable = w Dimension = 0
>>
> Dimension 0 is X ... and your longitude value of 73.542 resolves to
> a grid coordinate that is not an integer: 36.0016. If you 'set x
> 36' and try again, it should be fine.
> --Jennifer
>
>>
>>   Error ocurred at column 1
>> DISPLAY error: Invalid expression
>>   Expression = w
>>
>> Variable w is present in when I do a "q file" and I can plot the w
>> field on an XY plane for any time, which means no problem with the
>> field.
>>
>> I had the same done for my coarser grid with no probelm where the
>> coarser grid had 90x90 points. What does this error means and how
>> do I fix this
>> Thank you
>>
>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
>
>

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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