[ncl-talk] Color names

[Rick Brownrigg]

Oh, BTW:  read_colormap_file()  will always return an array of Nx4, ie.,
RGB-alpha tuples.  If you have previously set cnFillPalette with a named
color map that consisted of only RGB tuples, then you might get an
mis-match error if you try and reassign cnFillPalette as I suggested. In
that case, be sure to use the reassignment operator :=

res at cnFillPalette := cmap(::-1,:)

RB

On Wed, Jul 7, 2021 at 10:43 AM Rick Brownrigg <brownrig at ucar.edu> wrote:

> How about something like:
>
>      cmap = read_colormap_file("MPL_PuOr")
>      res at cnFillPalette = cmap(::-1,:)
>
> Rick
>
> On Wed, Jul 7, 2021 at 10:21 AM Buzan, Jonathan <jbuzan at purdue.edu> wrote:
>
>> Hi Rick,
>>
>> To get more detailed, I need to reverse colors on some maps.
>>
>> Thanks,
>> -Jonathan
>>
>>
>>   res at cnFillPalette = "BlueDarkRed18"
>> ; need to reverse MPL_PuOr
>>   res at cnFillPalette = “MPL_PuOr"
>>
>>
>>
>>
>> On Jul 7, 2021, at 11:03 AM, Buzan, Jonathan via ncl-talk <
>> ncl-talk at mailman.ucar.edu> wrote:
>>
>> Hi Rick,
>>
>> Thanks for your help. I was mostly concerned about finding similarly
>> sized color tables in the color table and using the cnFillPalette to call
>> the tables, so that each plot would have a unique colorbar while still
>> using the same plot res.
>>
>> Cheers,
>> -Jonathan
>>
>>
>>
>> On Jul 6, 2021, at 5:21 PM, Rick Brownrigg <brownrig at ucar.edu> wrote:
>>
>> Hi Jonathan,
>>
>> I don't fully understand what you are trying to do, and why you might
>> need named colors. So taking a guess here, there is the
>> read_colormap_file() that you can use to read one of the colormaps show in
>> the gallery link, and from that you can directly assign the result to
>> cnFillPalette
>>
>> http://ncl.ucar.edu/Document/Functions/Built-in/read_colormap_file.shtml
>>
>> HTH...
>> Rick
>>
>>
>> On Tue, Jul 6, 2021 at 6:54 AM Buzan, Jonathan via ncl-talk <
>> ncl-talk at mailman.ucar.edu> wrote:
>>
>>> Hi NCL,
>>>
>>> The predefined colormaps are excellent examples of colors.
>>> However, from my experience, the   gsn_define_colormap(wks, colors)
>>> limits the flexibility of NCL.
>>>
>>> Whereas, the  res at cnFillPalette has flexibility.
>>>
>>> I am attempting to generate a multi paneled plot, and switching the
>>> res at cnFillPalette, but I still want to use the color maps.
>>>
>>> Is there a page that has “named colors” of the color maps?
>>> https://www.ncl.ucar.edu/Document/Graphics/named_colors.shtml
>>> This page has example colors, but I find it difficult to reproduce these
>>> colormaps:
>>> https://www.ncl.ucar.edu/Document/Graphics/color_table_gallery.shtml
>>>
>>>
>>> Cheers,
>>> -Jonathan
>>>
>>>
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>>
>>
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