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[IDV #BFJ-629522]: help with error when using simple difference

Hi Jason,

I'd say you nailed the problem yourself and the IDV gave you an accurate
message: incompatible units.

For starters, you're gonna have to make the vertical coordinate system of these
data compatible if you want to do this calculation.

Best,

Unidata IDV Support

> Full Name: Jason Warren
> Email Address: address@hidden
> Organization: self
> Package Version: 5.3 build date:2016-05-23 19:17 UTC
> Operating System: Windows 8.1
> Hardware: Java: home: C:\Program Files\IDV_5.3\jre version: 1.8.0_45 
> j3d:1.6.0-pre9-daily-experimental daily
> Description of problem:
> 
> I am trying to create height anomaly maps using cfsv2 data and current gfs
> data using the simple difference formula.  I receive the following error:
> 
> Creating display: Color-Filled Contour Plan View
> visad.UnitException: visad.UnitException
> visad.UnitException
> 
> The units in the cfsv2 dataset are m by default, and Pa by default in
> the gfs dataset.  I have tried to reset the default parameters, but I
> am still getting this error.
> 
> Any assistance you could provide would be appreciated.
> 
> Please let me know if you need any additional information from me.
> 
> ******************
> Stack trace:
> visad.UnitException
> at visad.RealType.binary(RealType.java:474)
> at visad.RealTupleType.binary(RealTupleType.java:287)
> at visad.FunctionType.binary(FunctionType.java:271)
> at visad.FunctionType.binary(FunctionType.java:271)
> at visad.DataImpl.binary(DataImpl.java:141)
> at ucar.unidata.data.grid.GridMath.binary(GridMath.java:370)
> at ucar.unidata.data.grid.GridMath.doMath(GridMath.java:350)
> at ucar.unidata.data.grid.GridMath.subtract(GridMath.java:176)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186)
> at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:204)
> at org.python.core.PyObject.__call__(PyObject.java:496)
> at org.python.core.PyObject.__call__(PyObject.java:500)
> at org.python.pycode._pyx68.sub$6(<string>:63)
> at org.python.pycode._pyx68.call_function(<string>)
> at org.python.core.PyTableCode.call(PyTableCode.java:167)
> at org.python.core.PyBaseCode.call(PyBaseCode.java:307)
> at org.python.core.PyBaseCode.call(PyBaseCode.java:145)
> at org.python.core.PyFunction.__call__(PyFunction.java:423)
> at org.python.pycode._pyx83.f$0(<string>:1)
> at org.python.pycode._pyx83.call_function(<string>)
> at org.python.core.PyTableCode.call(PyTableCode.java:167)
> at org.python.core.PyCode.call(PyCode.java:18)
> at org.python.core.Py.runCode(Py.java:1386)
> at org.python.core.__builtin__.eval(__builtin__.java:497)
> at org.python.core.__builtin__.eval(__builtin__.java:501)
> at org.python.util.PythonInterpreter.eval(PythonInterpreter.java:251)
> at ucar.unidata.data.DerivedDataChoice.getData(DerivedDataChoice.java:795)
> at ucar.unidata.data.DataChoice.getData(DataChoice.java:628)
> at ucar.unidata.data.DataInstance.getData(DataInstance.java:243)
> at ucar.unidata.data.DataInstance.getData(DataInstance.java:207)
> at ucar.unidata.data.grid.GridDataInstance.init(GridDataInstance.java:206)
> at ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:163)
> at ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:144)
> at 
> ucar.unidata.idv.control.GridDisplayControl.doMakeDataInstance(GridDisplayControl.java:294)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.initializeDataInstance(DisplayControlImpl.java:3319)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlImpl.java:3275)
> at ucar.unidata.idv.control.PlanViewControl.setData(PlanViewControl.java:664)
> at 
> ucar.unidata.idv.control.ContourPlanViewControl.setData(ContourPlanViewControl.java:195)
> at ucar.unidata.idv.control.PlanViewControl.init(PlanViewControl.java:489)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1441)
> at 
> ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1124)
> at ucar.unidata.idv.ControlDescriptor.initControl(ControlDescriptor.java:986)
> at ucar.unidata.idv.ControlDescriptor$1.run(ControlDescriptor.java:911)
> at ucar.unidata.util.Misc$3.run(Misc.java:1243)
> 
> 
> 


Ticket Details
===================
Ticket ID: BFJ-629522
Department: Support IDV
Priority: Normal
Status: Closed
===================
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