Date: Tue Aug 16 2011 - 13:34:13 MDT
Hi Adam,
Thanks for your help. Finally I got one in the attachment. Could you also
please tell me how to make the black lines between the colors transparent or
white? Thanks again.
Hongyan
On Tue, Aug 16, 2011 at 11:46 AM, Adam Phillips <asphilli@ucar.edu> wrote:
> Hi Hongyan,
> No, there is no automatic way to do this. If you want to use all 200
> colors from the BlAqGrYeOrReVi200 colormap, and you want the middle color
> (representing -.01:.01) to be white, you will have to set that up
> manually:
>
> colors = new(201,integer)
> colors(:99) = ispan(2,101,1)
> colors(100) = 0 ; or -1 if you truly want transparent
> colors(101:) = ispan(102,201,1)
> res@cnFillColors = colors
>
> You would also have to set cnLevels explicitly to whatever you'd like.
> Finally, if you truly want to use all 200 colors in your labelbar, you're
> probably going to want to set lbLabelStride = 10 (or somewhere > 10), as
> this will reduce the number of label bar labels to every 10th label...
> Hope that helps.. Adam
>
> > Hi dear all,
> >
> > My current color bar is like the attachment. The NCL code I'm using is:
> >
> > gsn_define_colormap(wks,"BlAqGrYeOrReVi200")
> > res = True
> > res@mpFillOn = False
> ;
> > turn map fill off
> > res@mpOutlineOn = True
> ;
> > turn the map outline on
> > res@cnLevelSelectionMode = "ExplicitLevels"
> ;
> > set explicit contour levels
> > res@cnFillOn = True
> ;
> > turn on color fill
> > res@cnLinesOn = False
> ;
> > turn off the contour lines
> > res@cnLevels = (/ -5., -1, -0.01, 0.01,1, 5, 10, 15.,20, 25, 30,
> 35,
> > 40, 45, 50/) ; set levels
> > res@cnFillColors =
> > (/2,16,31,0,56,63,75,84,96,106,115,127,139,150,165,175,191,201/) ; set
> the
> > colors to be used
> >
> > My question is if I can use as many as possible colors, say all the color
> > in
> > "BlAqGrYeOrReVi200", and keep the -0.01 and 0.01 labels in the color bar,
> > the others can be automatically generated. Since the transparent color
> > (white) between -0.01~0.01 is very important for me, I must keep them.
> > Appreciate your help!
> >
> > Have a good day.
> > --
> > Cordially,
> > Hongyan(ΊθΡγ)
> > Tel: 1-519-8884567ext36667
> > _______________________________________________
> > ncl-talk mailing list
> > List instructions, subscriber options, unsubscribe:
> > http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> >
>
>
> __________________________________________________
> Adam Phillips asphilli@ucar.edu
> NCAR/Climate and Global Dynamics Division
> P.O. Box 3000 (303) 497-1726
> Boulder, CO 80307-3000
> http://www.cgd.ucar.edu/cas/asphilli
>
>
-- Cordially, Hongyan(ΊθΡγ) Tel: 1-519-8884567ext36667
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