[IDV #OWY-715558]: difficulties plotting vector field

Austin,

If you hold down the middle mouse button in the display, you can get the
values for U/V.

Alternatively you may try to define your own Jython Formula. There is a
screencast on how to do this:

https://www.youtube.com/watch?v=TuHpf3HT3Xs&list=PLQut5OXpV-0gqVk8LFD6Riv6X3QcAVw_U&index=14

When displaying your formula, you should be able to choose a "Value Plot".

Best,

Unidata IDV Support


> Thank you.
> 
> I was able to plot a vector plan view of the currents derived from u,v.
> 
> While there is a nice map of the field, is there a way to determine grid
> point values - current direction and speed at given latitude and longitude?
> or have values at the cursor displayed?  On the map, the cursor gives
> latitude, longitude and altitude.
> 
> Austin
> -----Original Message-----
> From: Unidata IDV Support
> Sent: February 17, 2015 13:12
> To: address@hidden
> Cc: address@hidden
> Subject: [IDV #OWY-715558]: difficulties plotting vector field
> 
> Austin,
> 
> What is it you are trying to do? If you are try to plot flow vectors, this
> can
> be done easily by setting up IDV parameter aliases.
> 
> In the field selector, right-click on the Eastward Water Velocity. This will
> allow you to set up a parameter alias. You can hack it by selecting an alias
> of
> U wind component. Do the same for the V field. At this point reload the data
> by
> right clicking on the Data Source in the Field Selector. This will make a
> "Derived" node under 2D fields. From there, you can plot your flow vectors.
> 
> Best,
> 
> Unidata IDV Support
> 
> > Thank you.  File uploaded successfully.
> >
> > Austin
> >
> > -----Original Message-----
> > From: Unidata IDV Support
> > Sent: February 17, 2015 10:26
> > To: address@hidden
> > Cc: address@hidden
> > Subject: [IDV #OWY-715558]: difficulties plotting vector field
> >
> > Austin,
> >
> > Please upload you data here:
> >
> > http://motherlode.ucar.edu/repository/alias/idvupload
> >
> > Let us know when they are there.
> >
> > Also tell us what fields you are trying to plot.
> >
> > Best,
> >
> > Unidata IDV Support
> >
> > > Full Name: austin dooley
> > > Email Address: address@hidden
> > > Organization: self
> > > Package Version: 5.0u2 build date:2014-11-12 20:09 UTC
> > > Operating System: Windows 7
> > > Hardware: Java: home: C:\Program Files (x86)\Java\jre1.8.0_31 version:
> > > 1.8.0_31 j3d:1.6.0-pre10-daily-experimental daily
> > > Description of problem:
> > >
> > > Creating display: Vector Plan View
> > >
> > > TypeError: unsupported operand type(s) for ^: 'visad.FieldImpl' and
> > > 'visad.FieldImpl'
> > > org.python.core.PyException
> > >
> > > I get to the data selector and when both u and v are selected, program
> > > says no data - but i can plot u, v contour fields but not vector
> > > fields. thanks.
> > >
> > > ******************
> > > Stack trace:
> > > Traceback (most recent call last):
> > > File "<string>", line 1, in <module>
> > > TypeError: unsupported operand type(s) for ^: 'visad.FieldImpl' and
> > > 'visad.FieldImpl'
> > >
> > >
> > >
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: OWY-715558
> > Department: Support IDV
> > Priority: Normal
> > Status: Closed
> >
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: OWY-715558
> Department: Support IDV
> Priority: Normal
> Status: Closed
> 
> 


Ticket Details
===================
Ticket ID: OWY-715558
Department: Support IDV
Priority: Normal
Status: Closed