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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
> Hi Yuan, > > Sorry to bother you again but I still get a pop-up box that says I have not > selected any data. > > I am still confused. Stu, It is very difficult to communicate through email to learn how to use of this application. We have online training document that can help you better. http://www.unidata.ucar.edu/software/idv/docs/workshop/toc.html#index.html Yuan > > Can start at the beginning please. To create a plot of wind shear, what field > selector do I choose? Is it located under my WRF data set or Formulas? Is it > 2D, 2D derived, 3D or 3D derived? The only way I can find what you describe > is if I select the Formulas (under the field selector) - then where to from > here? Maps, Grids, Miscellaneous, Export, Imagery? Again, I'm assuming > "grids" then I can select "layer wind shear". After I click on create display > the lowest two sigma layers pop up automatically - and these are what I want. > Then I get another "field selector" menu. Under field "u" - what do I select? > And under field "v" - what I do select? > > We heard about the terrible flooding on our news here in New Zealand - so I'm > guessing you must be in Colorado? Hope all is ok there now? > > Thanks again > > Stu > > > > -----Original Message----- > From: Unidata IDV Support [mailto:address@hidden] > Sent: Wednesday, 18 September 2013 7:27 a.m. > To: address@hidden > Cc: address@hidden > Subject: [IDV #ERW-649143]: atmospheric research > > > Thank you for your reply, but I have absolutely no idea what you mean. I am > > new to this software. The only option I see to plot wind shear is under the > > formulas tab. Where and when do you select the data for the two layers I am > > interested in? > > > > Regards > > > > Stu > > > > Stu, > Sorry for the delay, there was huge flooding in this area last week and > things not back to normal yet. > For the wind shear plot, after you select a flow display and click Create > Display button, there is a window popup for specifying the top and bottom > layers, this is what I mean here. For the WRF model, you need to enter the > value of the sigma layer, such as 0.46 and 0.8, and click ok, now, another > window popup for you to select u and v. I tried on my machine with some old > wrf data, and it worked as expected. Let me know if you need more help. > > > > Yuan > > -----Original Message----- > > From: Unidata IDV Support [mailto:address@hidden] > > Sent: Sunday, 15 September 2013 4:35 a.m. > > To: address@hidden > > Cc: address@hidden > > Subject: [IDV #ERW-649143]: atmospheric research > > > > > Full Name: stu powell > > > Email Address: address@hidden > > > Organization: university of canterbury Package Version: 4.1 build > > > date:2013-08-02 18:38 UTC Operating System: Windows XP > > > Hardware: Java: home: C:\Program Files\IDV_4.1\jre version: 1.6.0_43 > > > j3d:1.5.2 fcs (build4) Description of problem: > > > > > > Creating display: Color-Shaded Plan View No data selected > > > > > > ?? why does it keep defaulting to this? How do I pick up the data to > > > create a plot of wind shear between 2 layers? > > Stu, > > > > I think the problem is that you are working on the WRF dataset and this > > doesn't have the pressure levels, you need to make sure the levels selected > > for the 2 layers are in the dataset. > > In other word, don't use the default layers when the selecting window popup. > > Yuan > > > > > > ****************** > > > Stack trace: > > > java.lang.IllegalStateException: No data selected at > > > ucar.unidata.idv.ui.IdvUIManager.selectDataChoices(IdvUIManager.java > > > :5 > > > 589) at > > > ucar.unidata.idv.IntegratedDataViewer.selectDataChoices(IntegratedDa > > > ta > > > Viewer.java:1016) at > > > ucar.unidata.data.DerivedDataChoice.collectOperands(DerivedDataChoice. > > > java:558) at > > > ucar.unidata.data.DerivedDataChoice.getData(DerivedDataChoice.java:7 > > > 38 > > > ) 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:2 > > > 06 > > > ) at > > > ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java > > > :1 > > > 63) at > > > ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java > > > :1 > > > 44) at > > > ucar.unidata.idv.control.GridDisplayControl.doMakeDataInstance(GridD > > > is > > > playControl.java:284) at > > > ucar.unidata.idv.control.DisplayControlImpl.initializeDataInstance(D > > > is > > > playControlImpl.java:3224) at > > > ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlIm > > > pl > > > .java:3206) at > > > ucar.unidata.idv.control.PlanViewControl.setData(PlanViewControl.java: > > > 641) at > > > ucar.unidata.idv.control.PlanViewControl.init(PlanViewControl.java:4 > > > 71 > > > ) at > > > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl. > > > ja > > > va:1421) at > > > ucar.unidata.idv.control.DisplayControlImpl.init(DisplayControlImpl. > > > ja > > > va:1106) 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:1251) > > > > > > > > > > > > > > > Ticket Details > > =================== > > Ticket ID: ERW-649143 > > Department: Support IDV > > Priority: Normal > > Status: Open > > > > > > > Ticket Details > =================== > Ticket ID: ERW-649143 > Department: Support IDV > Priority: Normal > Status: Closed > > Ticket Details =================== Ticket ID: ERW-649143 Department: Support IDV Priority: Normal Status: Closed