Also, see:
http://www.ncl.ucar.edu/Document/Functions/Contributed/symMinMaxPlt.shtml
and
http://www.ncl.ucar.edu/Document/Functions/Built-in/nice_mnmxintvl.shtml
Adam Phillips wrote:
> Hi Debasish,
> There are 2 ways to do it.
> 1) Assuming you are using gsnSpreadColors, you can set
> gsnSpreadColorStart or gsnSpreadColorEnd:
> http://www.ncl.ucar.edu/Document/Graphics/Resources/gsn.shtml#gsnSpreadColorEnd
> http://www.ncl.ucar.edu/Document/Graphics/Resources/gsn.shtml#gsnSpreadColorStart
>
> Using one of these resources to keep the white color around 0 in your
> labelbar would require some iterating. Alternatively, you could create a
> small function of your own that would calculate, based on the chosen
> contour levels, what to set gsnSpreadColorStart/gsnSpreadColorEnd to.
>
> 2) Manually set the cnFillColors resource:
> http://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnFillColors
> using the BlWhRe colormap.
>
> There are many application examples that show how to use cnFillColors
> and the gsnSpreadColor* resources. One easy way to find them is by going
> to this page:
> http://www.ncl.ucar.edu/Applications/res_list.shtml
> Good luck,
> Adam
>
> Debasish PaiMazumder wrote:
>
>> Hello,
>>
>> I am using "BlWhRe" color map to plot difference. I always set same
>> absolute value as maximum (+) and minimum (-) value of the contour to
>> get all negative values in blue color and all positive values in red
>> color. But when absolute values of the maximum and minimum of the
>> difference are in different order, I waste lots blue or red colors.
>> Is there anyway I can plot all negative values in blue color and all
>> positive values in red color without setting same maximum (+) and
>> minimum (-) absolute value of the contour?
>>
>> Thanks for your help
>>
>> Debasish
>>
>> Debasish PaiMazumder, PhD
>> Hydrology & Climate Science
>> Postdoctoral Researcher at UQÀM/Ouranos
>> 550, Sherbrooke west, 19th floor, west tower,
>> Montréal, QC, Canada H3A 1B9
>> Tel: (514) 282-6464-343
>> (514) 937-0042 (R)
>> email: debasish_at_sca.uqam.ca <mailto:debasish_at_sca.uqam.ca>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------
>>
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>
>
-- ====================================================== Dennis J. Shea tel: 303-497-1361 | P.O. Box 3000 fax: 303-497-1333 | Climate Analysis Section | Climate & Global Dynamics Div. | National Center for Atmospheric Research | Boulder, CO 80307 | USA email: shea 'at' ucar.edu | ====================================================== _______________________________________________ ncl-talk mailing list List instructions, subscriber options, unsubscribe: http://mailman.ucar.edu/mailman/listinfo/ncl-talkReceived on Thu Sep 10 2009 - 15:03:09 MDT
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