[ncl-talk] How to change color bar for the second field using gsnHistogramCompare
rK Aditya
aditya.rk at gmail.com
Mon May 23 13:20:04 MDT 2016
Dear Mary,
Thank you so much for your effort. This gives more extension of solutions
to my problem. So nice.
Kindest regards,
-r/K-
On Wed, May 18, 2016 at 12:14 AM, Mary Haley <haley at ucar.edu> wrote:
> As I attempted to fix the histogram problem, I realized there were a lot
> of changes to make to some internal code to handle the different types of
> color that can be input (index color, named colors, RGB colors, RGBA
> colors).
>
> I've attached a new version of "utilities.ncl" and an internal
> "hist_columns" function that fixes the multiple colors issue. I included an
> example code to try the fix.
>
> Save all three scripts and then run with:
>
> ncl histo_bar_colors.ncl
>
> This script uses the now-fixed "gsnHistogramBarColors", in which you can
> give it an array of colors whose dimensionality fits that with the number
> of bars you have and whether you are doing a compare.
>
> For example, if you have 2 sets of bars with 5 bars each, then you can
> provide a 2 x 5 array of index colors, named colors, or RGB/RGBA arrays to
> set the color for each bar:
>
> colors =
> (/(/"maroon4","firebrick","yellow","paleturquoise1","darksalmon"/),\
> (/ "orange","forestgreen","tan3","navyblue","hotpink"/)/)
>
> res at gsnHistogramBarColors = colors
>
> --Mary
>
>
> On Mon, May 16, 2016 at 11:10 AM, Mary Haley <haley at ucar.edu> wrote:
>
>> Hi,
>>
>> The gsn_histogram code needs to be cleaned up so it can handle color
>> better. I'm looking into this and hope to have a fix.
>>
>> The issue is trying to handle the different color types that can now come
>> in:
>>
>> - named colors ("red", "blue")
>> - indexed color (1, 3, 7)
>> - RGB color
>> - RGBA color
>>
>> Right now the code is assuming either RGB or indexed color AND it doesn't
>> recognize the fact that you might have a second set of bars that you might
>> want colored differently. It's not a bug, but just the way the code was
>> implemented. It could be thought out better!
>>
>> --Mary
>>
>>
>> On Mon, May 16, 2016 at 3:09 AM, rK Aditya <aditya.rk at gmail.com> wrote:
>>
>>> Dear All,
>>>
>>> Got it! I need to change gsn_code.ncl and introduce
>>>
>>> gsres at gsFillColor = fillcolor(j) manually inside do j=nbarsinbin-1,0,1.
>>>
>>> Cheers,
>>> -r/K-
>>>
>>> On Mon, May 16, 2016 at 6:59 AM, rK Aditya <aditya.rk at gmail.com> wrote:
>>>
>>>> Dear Guilherme,
>>>>
>>>> Thank you for the suggestion. I tried to activate gsnXYBarChart toTrue
>>>> as well, but gsnXYBarChartColors2 or gsnXYBarChartColors are not valid
>>>> resources for this. I still could not change the color bar for the second
>>>> field.
>>>>
>>>> Kindest regards,
>>>> -r/K-
>>>>
>>>>
>>>>
>>>> On Mon, May 16, 2016 at 2:08 AM, Guilherme Martins <jgmsantos at gmail.com
>>>> > wrote:
>>>>
>>>>> I'm note sure but try: gsnXYBarChartColors2 or gsnXYBarChartColors.
>>>>>
>>>>> Guilherme.
>>>>>
>>>>> Em dom, 15 de mai de 2016 às 16:11, rK Aditya <aditya.rk at gmail.com>
>>>>> escreveu:
>>>>>
>>>>>> Dear All,
>>>>>>
>>>>>> I would like to compare histogram for two seasons; winter and summer.
>>>>>> I use the first field for summer and put it with filled red color. But I
>>>>>> could not change the color in the second field, on crosshatch pattern to
>>>>>> other color, let say blue.
>>>>>>
>>>>>> If someone can help me?
>>>>>>
>>>>>> Thank you for your time.
>>>>>>
>>>>>> Kindest regards,
>>>>>> -r/K-
>>>>>>
>>>>>>
>>>>>> begin
>>>>>> ;************************************************
>>>>>> ; Generate some random data.
>>>>>> ;************************************************
>>>>>> x = new(1000,integer)
>>>>>> y = new(1000,integer)
>>>>>> do i=0,dimsizes(x)-1
>>>>>> x(i) = rand()
>>>>>> y(i) = rand()
>>>>>> end do
>>>>>> x = x/320
>>>>>> y = y/320
>>>>>>
>>>>>> ;************************************************
>>>>>> ; Set up a variable to hold both x and y.
>>>>>> ;************************************************
>>>>>> z = new((/2,dimsizes(x)/),integer)
>>>>>> z(0,:) = x
>>>>>> z(1,:) = y
>>>>>> ;************************************************
>>>>>> ; create plot
>>>>>> ;************************************************
>>>>>> wks = gsn_open_wks("png","histo") ; send graphics to
>>>>>> PNG file
>>>>>> gsn_define_colormap(wks,"temp1") ; choose colormap
>>>>>>
>>>>>> res = True ; plot mods desired
>>>>>> res at gsnHistogramCompare = True
>>>>>> res at gsnHistogramBinIntervals = (/25,50,75/)
>>>>>> ; res at gsFillColors = (/(/"blue","red"/),(/"blue","red"/)/)
>>>>>> ; res at gsFillColor=(/"blue","blue","red","red"/)
>>>>>> res at gsnHistogramBarColors = (/(/"red","blue"/),(/"red","blue"/)/)
>>>>>> ; res at gsnHistogramBarColors=(/"blue","blue","red","red"/)
>>>>>> plot=gsn_histogram(wks,z,res) ; create histogram
>>>>>> end
>>>>>> [image: Inline image 1]
>>>>>> _______________________________________________
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>>>>>> ncl-talk at ucar.edu
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>>>>>>
>>>>> --
>>>>>
>>>>> ------------------------------------------------------------------------------------------
>>>>> Dr. Guilherme Martins
>>>>> Instituto Nacional de Pesquisas Espaciais (INPE)
>>>>> Centro de Previsão de Tempo e Estudos Climáticos (CPTEC)
>>>>> Grupo de Desenvolvimento em Assimilação de Dados (GDAD)
>>>>> Telefone (INPE/CP): +55 12 3186-8551 || Celular (TIM): +55 12
>>>>> 98152-8580
>>>>> E-mail: guilherme.martins at inpe.br || jgmsantos at gmail.com
>>>>> Skype: guilherme.martins.
>>>>> Homepage: https://sites.google.com/site/jgmsantos
>>>>> Currículo Lattes: http://lattes.cnpq.br/5997657584785803
>>>>>
>>>>> ------------------------------------------------------------------------------------------
>>>>>
>>>>
>>>>
>>>
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>>
>
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