[ncl-talk] WG: WG: extra colors around plotted objects

[Arne Melsom]

OK I guess that you want colors to be interpolated in one interval, but not in its complement (the complement being <15).

I'm not sure if this is possible in ncl using other plot resource options, the real experts will know.

What I guess you could do, is to regrid your array to a finer resolution using e.g. bilinear interpolation (see https://www.ncl.ucar.edu/Applications/regrid.shtml for examples; perhaps use a result which has ~10x as many points in x and y), then reset values <15 to 0, and plot the result with e.g. res at cnFillMode = "RasterFill"


----- Original Message -----
> 
> 
> 
> Thank you very much for your quick response Arne. It does work with
> "CellFill" an "RasterFill"but I do not want the plot to be  pixelated
> (attached png). Hopefully there is another way to avoid the extra colors
> and keep the same quality.
> 
> 
> 
> Paraskevi Giannakaki , PhD student
> Climate impact group,
> Institute of Geography, University of Bern
> Hallerstrasse 12, 5th floor
> CH-3012 Bern
> Mail: paraskevi.giannakaki at giub.unibe.ch
> ________________________________________
> Von: Arne Melsom [arne.melsom at met.no]
> Gesendet: Montag, 7. September 2015 13:21
> An: Giannakaki, Paraskevi (GIUB)
> Cc: ncl-talk at ucar.edu
> Betreff: Re: [ncl-talk] WG: extra colors around plotted objects
> 
> Hi Paraskevi,
> Not sure if it helps, but perhaps try including
>  res at cnFillMode = "RasterFill"
> or
>  res at cnFillMode = "CellFill"
> Regards,
> Arne
> 
> ----- Original Message -----
> >
> >
> > Dear all,
> >
> > I want to make a plot using a threshold of 15 (so everything less than 15
> > is
> > equal to zero). When I make the plots, around the fileds which survive the
> > thresholding process there are colors of the colormap which has to do with
> > values less than 15. In the example I send you (GRADPV.png), there are blue
> > and skyblue contours around my fields which should not be there. I want to
> > keep the entire color-table, so I do not want to change my color scale to
> > start from 15. Any ideas about what's wrong with the plots and how can I
> > fix
> > this?? You will find enclosed my ncl script and the file I used for the
> > plot.
> >
> > Thank you very much in advance for your help!
> >
> >
> >
> > Paraskevi Giannakaki , PhD
> > Climate impact group,
> > Institute of Geography, University of Bern
> > Hallerstrasse 12, 5th floor
> > CH-3012 Bern
> > Mail: paraskevi.giannakaki at giub.unibe.ch
> >
> > _______________________________________________
> > ncl-talk mailing list
> > ncl-talk at ucar.edu
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> >
> 
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