[ncl-talk] dividing color map to intervals

[M P]

Ok, I think I know how to do it

On Fri, Nov 22, 2019 at 11:58 AM M P <mzp3769 at gmail.com> wrote:

> Yes, but in all examples that I can find color matrix is defined
> e.g.
>
> res at xyMarkerColors     = (/"darkgoldenrod","darkgreen","coral4", \
>                              "cyan3","firebrick1","darkslateblue","limegreen",     \
>
> "lightgoldenrod","darkseagreen1","lightsteelblue1"/)
>
> rather than as a colormap/palette
> gsn_define_colormap(wks,"WhiteBlueGreenYellowRed")
> Is there a way to divide a palette to e.g. 20 intervals. Or am I missing
> an example that you are referring to?
> Thanks
>
>
>
> On Fri, Nov 22, 2019 at 11:53 AM Rick Brownrigg <brownrig at ucar.edu> wrote:
>
>> Hi,
>>
>> There are a number of examples of such scatter plots at:
>>
>>     http://ncl.ucar.edu/Applications/scatter.shtml
>>
>> Perhaps there's one similar to what you want to do.
>>
>> Rick
>>
>>
>> On Fri, Nov 22, 2019 at 11:44 AM M P via ncl-talk <ncl-talk at ucar.edu>
>> wrote:
>>
>>> Yes, but the issue is that I don't want to plot contours, but a
>>> scatterplot so that points in various ranges are colored differently.
>>>
>>> On Fri, Nov 22, 2019 at 8:34 AM Dennis Shea <shea at ucar.edu> wrote:
>>>
>>>> Please read NCL documentation.
>>>>
>>>> NCL automatically spans all color maps.
>>>>
>>>>   res at cnLevelSelectionMode = "ManualLevels"     ; set manual contour levels
>>>>   res at cnMinLevelValF       =                    ; set min contour level
>>>>   res at cnMaxLevelValF       =                    ; set max contour level
>>>>   res at cnLevelSpacingF      =                    ; set contour spacing
>>>>
>>>>
>>>>
>>>> On Thu, Nov 21, 2019 at 8:11 PM M P via ncl-talk <ncl-talk at ucar.edu>
>>>> wrote:
>>>>
>>>>> Hello,
>>>>> I define a colormap as
>>>>>
>>>>> gsn_define_colormap(wks,"WhiteBlueGreenYellowRed")
>>>>>
>>>>> I want to divide it into e.g. 20 equal intervals so I can plot data in
>>>>> different ranges
>>>>> with different colors.
>>>>>
>>>>> Can you help how to e.g. create an array colors[i] that would span the
>>>>> whole range? Or there is another way to do it?
>>>>>
>>>>> Thanks,
>>>>> Mark
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