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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
Alfred, Would it be possible to upload the RAP hybrid analysis files to http://motherlode.ucar.edu/repository/alias/idvupload Displaying wind speed should be a straight forward operation. In the IDV field selector tab of the Dashboard you should be able to find wind speed under 3D Grid > Momentum > Derived > Speed from U and V. If not it is possible to that you have to set up a parameter alias. https://www.unidata.ucar.edu/software/idv/docs/userguide/tools/AliasEditor.html Best, Unidata IDV Support > Full Name: Alfred Klausmann > Email Address: address@hidden > Organization: Exponent > Package Version: 5.0 build date:2014-06-01 23:09 UTC > Operating System: Windows 7 > Hardware: Java: home: C:\Program Files\IDV_5.0\jre version: 1.7.0_51 > j3d:1.6.0-pre9-daily-experimental daily > Description of problem: > > When trying to use formulas I get an error that there is no data selected. > > Creating display: Contour Plan View > No data selected > > I am using RAP hybrid analysis files and trying to do tasks like compute > the wind speed from the u and v components. I was able to add a formula, > but I can't seem to create the display from it? > > Thanks, > > Al > > ****************** > Stack trace: > java.lang.IllegalStateException: No data selected > at ucar.unidata.idv.ui.IdvUIManager.selectDataChoices(IdvUIManager.java:5655) > at > ucar.unidata.idv.IntegratedDataViewer.selectDataChoices(IntegratedDataViewer.java:1016) > at > ucar.unidata.data.DerivedDataChoice.collectOperands(DerivedDataChoice.java:558) > at ucar.unidata.data.DerivedDataChoice.getData(DerivedDataChoice.java:746) > at ucar.unidata.data.DataChoice.getData(DataChoice.java:637) > 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:299) > at > ucar.unidata.idv.control.DisplayControlImpl.initializeDataInstance(DisplayControlImpl.java:3278) > at > ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlImpl.java:3234) > at ucar.unidata.idv.control.PlanViewControl.setData(PlanViewControl.java:659) > at > ucar.unidata.idv.control.ContourPlanViewControl.setData(ContourPlanViewControl.java:194) > at ucar.unidata.idv.control.PlanViewControl.init(PlanViewControl.java:489) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1402) > at > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl.java:1085) > 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: MUH-833217 Department: Support IDV Priority: High Status: Closed