[ncl-talk] dividing color map to intervals

[M P]

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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