[Support #ARV-969650]: IDV formulas

Hey Jim-

> Holy cow, I got that jython line to work!  Hooray.  That is what I
> was looking for.  Thanks for the info on the case sensitivity.

Pretty soon, you won't even need me.  That makes me sad.

I modified lav so you can pass in a multi-leveled grid.  So, in today's
nightly build, you can just do lav(grid) and select a range of levels to 
average.  It replaces the lavg that I sent you earlier (but actually just makes 
the same call).

I'll look into your other stuff on Monday.  I gotta wean myself off 
weekend IDV support.

Don
  
> Unidata IDV Support wrote:
> > Hey Jim-
> >
> >
> >> FYI that "ADD" is not recognized either:
> >>
> >> Traceback (innermost last):
> >> File "<string>", line 1, in ?
> >> NameError: ADD
> >>
> >
> > Sorry, it's case sensitive.  It should be add, not ADD
> >
> > Do you want all layers in the model between 850-500, or just specific 
> > layers?  If they are contiguous layers, then you could create a jython 
> > procedure that is:
> >
> > def lavg(grid):
> >    return GridMath.applyFunctionOverLevels(grid, GridMath.FUNC_AVERAGE)
> >
> > and then in formulas, select Grids->Define a grid diagnostic and type in 
> > lavg(grid).  When you are prompted for the grid, you can select a range of 
> > levels in the field selector (click on the first level and then shift click 
> > on the upper level).
> >
> > For some reason, you can't just create a formula, you have to create the 
> > Jython function first.  I'll look into that and adding lavg as a system 
> > function on Monday.
> >
> > If they are non-contiguous layers (e.g. 850,700,500), then you would have 
> > to do the add instead.
> >
> >
> >> I can't wait until we can just say "Computer, plot the mean RH in
> >> the 850-500 mb layer in panel 2."  Captain Kirk can do that.
> >>
> >
> > I think you'll have to wait for the voice activated commands a little 
> > longer. Captain Kirk didn't live until the 23rd century. ;-)
> >
> > Don
> >
> >
> >> Unidata IDV Support wrote:
> >>
> >>> Jim-
> >>>
> >>> Please send these to support-idv (and include the python error).  dmurray 
> >>> won't work much longer. ;-)
> >>>
> >>>
> >>>
> >>>> For the life of me I can't get IDV formulas to work.  I get a python
> >>>> error every time.  Here I'm just trying to average 3 variables.  Why
> >>>> won't this work?  If this isn't enough info, let me know.
> >>>>
> >>>>
> >>> I assume you are using slices at different levels and getting an error 
> >>> about manifold dimension or some such thing.  The problem is that the 
> >>> resampling from one level to another is going to fail.  Although we tout 
> >>> the compatibility of Jython and VisAD, in reality if you are trying to do 
> >>> simple math functions (+,-,/,*) on different types of grids, you are 
> >>> better off using the GEMPAK syntax:
> >>>
> >>> ADD(ADD(A,B),C)/3
> >>>
> >>> I need to make functions like:
> >>>
> >>> AVG(A,B,C,...)
> >>>
> >>> These functions will remove the extra dimension which is causing you 
> >>> problems with the simple +, etc functions.
> >>>
> >>> I'll look into this more tomorrow.
> >>>
> >>> Don
> >>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: ARV-969650
> >>> Department: Support IDV
> >>> Priority: Normal
> >>> Status: Open
> >>>
> >>>
> >>>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: ARV-969650
> > Department: Support IDV
> > Priority: Normal
> > Status: Open
> >
> >
> 
> 


Ticket Details
===================
Ticket ID: ARV-969650
Department: Support IDV
Priority: Normal
Status: Open