Dimension Error: What does it mean???

[Jennifer Adams]

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



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