[ncl-talk] Vector arrows thickness and density

[Muhammad Omer Mughal]

Dear NCL team

Kindly see the two plots attached. In the old  setting the arrows were thin and at some points too small to be seen in the plots. I wanted to make the plots thicker so I used the following new settings (see attached plot)
      
        opts at vcLineArrowThicknessF      = 3
        opts_va at vcGlyphStyle = "LineArrow"
        opts_va at vcLineArrowColor="red"
        opts_va at vcMapDirection  = False
        opts_va at vcRefMagnitudeF = 4
        opts_va at vcRefLengthF    = 0.05
        opts_va at vcMinDistanceF  = 0.014

But now  I see the arrows too densely packed and also they are not  as  thick as I expected them to be. I also have the restriction that I cannot change the reference magnitude. 

I want to know how to reduce the arrows density and increase their thickness. I tried  using  
opts_va at NumVectors = 33  ​
But it was overridden  . I would be greatful to have your suggestions.

Regards 
 
 Muhammad Omer Mughal 
 MSc BSc Mechanical Engineering
 PhD  Research Scholar 
 Remote Sensing and Satellite Research Group 
 Department of Imaging and Applied Physics
 Curtin University
 
 Curtin University
 Tel | +61  8 9266 7962 
 Fax | +61  8 9266 2377
 Mobile | 0470 237 525  
 
 Email | m.mughal1 at postgrad.curtin.edu.au 
 Web | http://curtin.edu.au
 
  
 ​ Curtin University is a trademark of Curtin University of Technology. 
  
 CRICOS Provider Code 00301J (WA), 02637B (NSW) 
 
  
 ​
      
-------------- next part --------------
A non-text attachment was scrubbed...
Name: new_setting.png
Type: image/png
Size: 281893 bytes
Desc: new_setting.png
URL: <http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20190124/6e5b3324/attachment-0002.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: old_setting.png
Type: image/png
Size: 143254 bytes
Desc: old_setting.png
URL: <http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20190124/6e5b3324/attachment-0003.png>