Re: plot contourr lines with different colors

Dear Adam and David,

Thank you, It works nice as in Matlab.

Best,
Erika,

On Wed, Oct 16, 2013 at 3:07 AM, David Brown <dbrown@ucar.edu> wrote:

> Adding a bit to Adam's reply: if you have NCL 6.1.0 or later, you can set
> the new resource cnLinePalette with the name of a color table (such as
> gui_default), but the colors will automatically span the color table. You
> can
> control whether the color table is spanned or each line is given the next
> sequential color in the color map by setting the logical resource
> cnSpanLinePalette (default is True).
> -dave
>
> On Oct 15, 2013, at 11:57 AM, Adam Phillips <asphilli@ucar.edu> wrote:
>
> Hi Erika,
> You do not need to set cnLineColors, but that means NCL will choose the
> line colors based on the the colormap you are using. You lose some control
> that way. If cnLineColors are not set and you are using "gui_default", your
> first contour will be colored gui_default color #2 (blue), the second
> contour will be colored gui_default color #3 (a slightly lighter blue), and
> so on. Once the end of the colormap is reached, NCL will start over with
> gui_default color #2, proceed to color #3, and so on..
> Adam
>
> On 10/15/2013 11:50 AM, Erika Folova wrote:
>
> Thank you for the response,
>
> In this case, I will use the color table of "gui default",
> anyway I just wonder is there any automatic resource associated to the
> cnLevels, that can do this without using
> res@cnLineColors = (/2,4,8,11/), I mean it's gonna be a
> bit inconvenience to set each color, one by one
> if i have large interval contors in res@cnLevels= (1,2,3,4,...50).
>
> Thank you
> Erika
>
>
>
>
> On Wed, Oct 16, 2013 at 2:08 AM, Adam Phillips <asphilli@ucar.edu> wrote:
>
>> Hi Erika,
>> Yes, you need to set cnMonoLineColor = "False" and set cnLineColors. See
>> the cnLineColors description here:
>> http://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLineColors
>>
>> here's a brief example:
>>
>> wks = gsn_open_wks("x11","test")
>> gsn_define_colormap(wks,"Cat12")
>>
>> res = True
>> ....
>> res@cnLevelSelectionMode = "ExplicitLevels"
>> res@cnLevels = (/1,2,3,4/)
>> res@cnMonoLineColor = False
>> res@cnLineColors = (/2,4,8,11/)
>> plot = gsn_csm_xy(wks,arr&time,arr,res)
>>
>> Hope that helps. If not, please respond to the ncl-talk email list..
>> Adam
>>
>>
>> On 10/15/2013 11:03 AM, Erika Folova wrote:
>>
>> Hallo,
>>
>> I just wonder is it possible to draw the contour lines (as attached)
>> with different color options
>> in NCL? Thank you for your response.
>>
>> Erika
>>
>>
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>>
>> --
>> ______________________________________________________________
>> Adam Phillips asphilli@ucar.edu
>> NCAR/Climate and Global Dynamics Division (303) 497-1726
>> P.O. Box 3000
>> Boulder, CO 80307-3000 http://www.cgd.ucar.edu/cas/asphilli
>>
>>
>
>
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>
> --
> ______________________________________________________________
> Adam Phillips asphilli@ucar.edu
> NCAR/Climate and Global Dynamics Division (303) 497-1726
> P.O. Box 3000
> Boulder, CO 80307-3000 http://www.cgd.ucar.edu/cas/asphilli
>
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Received on Tue Oct 15 12:57:37 2013