[ncl-talk] Strange stippling behaviour when valid points are few and scattered apart

[Buzan, Jonathan]

Hi Rashed,

Looking at your script, it looks like the stipple is doing exactly what you said it to do:

      do n=0,20  
         sig({n},:) = 95.01
      end do


You set  resS at cnLevels             =(/ 95.,100. /)

The {n} in sig({n},:) means to set the latitudes 0-20 to 95.01. And the stipple is greater than 95. But lower than 100. So it stippled from 0-20 latitude.

-Jonathan




> On Jul 1, 2020, at 5:57 PM, Rashed Mahmood via ncl-talk <ncl-talk at mailman.ucar.edu> wrote:
> 
> Hi NCL,
> 
> I encountered strange stippling behaviour when valid data points are very few and are scattered apart from each other. At best I would expect no stippling overlaid on a filled map, however, it seems that NCL somehow covers the whole map with stippling.
> 
> To explain this, I created a small example script (attached) which reads data from the attached file. To play with it a bit, I just added some "fake data" to see what happens. In the script we could set it using "add_bogus_data = True".
> Attached are two plots after using original data and adding some fake data. I am not sure what is going on here, anyone? Ignore the file names!!
> 
> Cheers
> Rashed
> 
> <funny_stiple.ncl><tst_diff.nc><Mask_TEST_Original.pdf><Mask_TEST_Bogus.pdf>_______________________________________________
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