Re: ncl-talk Digest, Vol 119, Issue 19

From: tiffani <tiffani_drew_at_nyahnyahspammersnyahnyah>
Date: Wed Oct 16 2013 - 09:54:24 MDT

On 10/15/2013 11:00 AM, wrote:
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> Today's Topics:
> 1. Re: plot contourr lines with different colors (Adam Phillips)
> 2. Re: plot contourr lines with different colors (Erika Folova)
> 3. Re: plot contourr lines with different colors (Adam Phillips)
> ----------------------------------------------------------------------
> Message: 1
> Date: Tue, 15 Oct 2013 11:08:35 -0600
> From: Adam Phillips <>
> Subject: Re: plot contourr lines with different colors
> To: Erika Folova <>, NCL-talk <>
> Message-ID: <>
> Content-Type: text/plain; charset="iso-8859-1"
> Hi Erika,
> Yes, you need to set cnMonoLineColor = "False" and set cnLineColors. See
> the cnLineColors description here:
> 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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Hi all,
I am still waiting for some one to answer the problem of the spinning
disk, did I over tax you?
Here is how some one else has worded the same problem:

You have a compact disc rotating at a constant speed. The outer-most
edge of the compact disc is rotating at, say, 20 km/h. Thus, the
inner-most edge of a compact disc is also rotating at 20km/h. It is
easily noticeable that the outer edge is traveling a longer distance
than the inner edge, but if this is true, then the speeds should be
different (the outer edge should spin faster, as it has to cover more
distance in the same period of time). But saying that the outer edge
spins at a higher rate is also wrong. I tried this out with a paper disc
and made two markings (one on the inner edge and one on the outer edge)
on a straight line, and after spinning the disc for a while, the
markings were still in line with each other. If one of the edges had
spun faster than the other, the paper would have been ripped to pieces!
This simple experiment proves that the outer edge spins no faster than
the inner edge. This question seems unsolvable to me. I know that there
must be a mathematical explanation, but what?
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Received on Tue Oct 15 13:55:29 2013

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