Re: problem: "zero field" label and vcMinMagnitudeF

From: Mary Haley <haley_at_nyahnyahspammersnyahnyah>
Date: Tue Jun 19 2012 - 09:27:47 MDT

Silvio,

Thanks for the clarification. I was able to reproduce the problem, and I've filed a bug report, NCL-1495.
I tried setting vcZeroFLabelString to an empty string, but this didn't work either.

--Mary

On Jun 19, 2012, at 9:11 AM, Davolio Silvio wrote:

>
> Dear Mary,
> thanks for the promp answer.
>
> Your script works, but the porblem is that rest@vcZeroFLabelOn = False does not work if vcMinMagnitudeF is set
>
> Starting from your example, and using u,v grater than 0, if you just add a threshold you can not get rid of "Zero field" label:
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>
> begin
> u = new((/100,100/),float)
> v = new((/100,100/),float)
> u = 4.
> v = 4.
>
> wks = gsn_open_wks("x11","gsn_vector")
> res = True
> res@gsnMaximize = True
> res@vcRefMagnitudeF = 50.
> res@vcRefLengthF = 0.045
> res@vcZeroFLabelOn = False
> res@vcGlyphStyle = "windbarb"
> res@vcMinMagnitudeF = 10. ; THIS IS THE NEW LINE
>
> plot = gsn_csm_vector(wks,u,v,res)
>
> end
>
> Thanks
> Silvio
>
>
>
> On Tue, 19 Jun 2012, Mary Haley wrote:
>
>> Silvio,
>>
>> Setting rest@vcZeroFLabelOn = False should work.
>>
>> Try the script below:
>>
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>>
>> begin
>> u = new((/100,100/),float)
>> v = new((/100,100/),float)
>> u = 0.
>> v = 0.
>>
>> wks = gsn_open_wks("x11","gsn_vector")
>> res = True
>> res@gsnMaximize = True
>> res@vcRefMagnitudeF = 50.
>> res@vcRefLengthF = 0.045
>> res@vcZeroFLabelOn = False
>> res@vcGlyphStyle = "windbarb"
>>
>> plot = gsn_csm_vector(wks,u,v,res)
>>
>> end
>>
>>
>>
>> On Jun 19, 2012, at 7:55 AM, Davolio Silvio wrote:
>>
>>>
>>> Dear Sirs,
>>> I am trying to plot wind barbs only where speed is greater than 10 m/s
>>> So I set my resource
>>> res@vcMinMagnitudeF = 10.
>>> The wind field is overlaid to eq. pot. temperature field.
>>>
>>> Everything works, but when wind is weak (less than the fixed threshold) all over the domain. In this case the "Zero Field" label apper (over the temperature field) and I can not get rid of it.
>>>
>>> Setting
>>> resv@vcZeroFLabelOn = False
>>> or
>>> resv@vcZeroFLabelString = "" does not have any effect at all.
>>>
>>> Any ideas?
>>>
>>> Thanks
>>> Silvio
>>>
>>>
>>> **********************************************
>>> * Silvio Davolio *
>>> * *
>>> * ISAC - CNR *
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>>> * 40129 Bologna *
>>> * ITALY *
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>>
>
>
> **********************************************
> * Silvio Davolio *
> * *
> * ISAC - CNR *
> * Via Gobetti, 101 *
> * 40129 Bologna *
> * ITALY *
> * *
> * Ph +39 051 6399620 *
> * Fax +39 051 6399658 *
> * Mailto: S.Davolio AT isac.cnr.it *
> * s.davolio AT libero.it (home) *
> **********************************************
>
> Web Page: http://www.isac.cnr.it/dinamica/davolio
> Cloud Gallery: http://www.isac.cnr.it/dinamica/davolio/NUBI
>
> --- ---
> Sulla terra c'è abbastanza per soddisfare i bisogni di tutti,
> ma non per soddisfare l'ingordigia di pochi. (Gandhi)
> Earth provides enough to satisfy every man's need,
> but not every man's greed. (Gandhi)
> --- ---

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Received on Tue Jun 19 09:27:56 2012

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