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[IDV #VEG-265973]: quick questions on IDV

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [IDV #VEG-265973]: quick questions on IDV
  • Date: Sun, 02 Dec 2007 08:22:28 -0700
Hi Christine-

> I have two modified WRF output files...
> 
> I would like to plot the difference between the files (say, the
> difference in 2m T). I can not figure out how to do this. Could you
> please help?

Are they on the same times or different times?

You should try using the Miscellaneous->Simple difference formula.
Load in your WRF files, then select the Formulas Data Source and
the simple difference formula.Choose a display (or right click 
on the formula and select Evaluate and Save) and when prompted, 
select the two fields you want to difference from the loaded data.
If they are on different times/spatial domains, the second
grid will be resampled to the domain of the first grid.

Don Murray 


Ticket Details
===================
Ticket ID: VEG-265973
Department: Support IDV
Priority: Normal
Status: Open