[gradsusr] finding differences between two runs with ctl files having different number of variables

[Jennifer Adams]

What version of GrADS are you using?
What does the YDEF statement look like in both descriptors? 
Are you using open or xdfopen?
What is the dimension environment set to before you execute your display of mcape.2-mcape.1?
--Jennifer


On Jan 23, 2013, at 5:30 AM, Jagabandhu Panda wrote:

> Dear users:
>  
>      Hope you guys are doing fine. I need your help or suggestions to overcome a problem. I have WRF output from two model runs with same horizontal and vertical resolutions. I have two ctl files for this purpose with corresponding dat files for them. For both of these outputs, I have xdef, ydef, zdef and tdef same for both the files. However, the number of variables are different. One contains 166 variables and other 123. Since the model was tuned to produce more variables in the output file in the earlier case, the number of variables are more. However, in the later case it was not tuned to do so. On the other hand, they do produce same diagnostics after post processing.
>  
> When I want to find the difference between say 2dcape field from these two runs, I am unable to do so as it says:
>  
> Operation error:  Incompatable grids 
>   Dimension ranges aren't equivalent
>   Dimension = 1
>   1st grid range = 5 117   2nd = 5 117 
>   Error ocurred at column 16
> DISPLAY error:  Invalid expression 
>   Expression = mcape.2-mcape.1
> EXEC error:  error in metvar.sh.  EXEC stopped.
> I am unable to point out how to proceed to find the differences each hour for a meteorological variable from the two runs. Could you please suggest some way to overcome it if possible. I will really be thankful to you for this purpose.
>  
> Thanks and regards
> -- Jagabandhu
>  
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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