[ncl-talk] gsnXYBarChartColors request

[Alan Brammer]

Hi Rick,

No problem.  I see the difficulty there.
This was the work around I came up with.  Which is more than fine, just
haven't had to define a colormap in a while.


y := (/ 17., 16., 20., 21., 4./)
x := (/0,1,2,3,4/)
colors := (/
(/0.972549,0,0/),(/0.533333,0.25098,0.12549/),(/0,0,0.972549/),(/0.972549,0.470588,0/),(/0.972549,0,0.972549/)
/)

*gsn_define_colormap(wks, array_append_record( (/
(/1.,1.,1./),(/0.,0.,0./)/),colors,0) )  ;; need a back/foreground color to
start*

bars := True
bars at gsnXYBarChart = True
bars at trYMinF = 0.
*bars at gsnXYBarChartColors := ispan(2,dimsizes(y)+1,1) ;; This would cause a
problem if you don't have enough colors*
plot = gsn_csm_xy(wks,x, y, bars)


Alan.


On Mon, Aug 17, 2015 at 5:21 PM, Rick Brownrigg <brownrig at ucar.edu> wrote:

> Hi Alan,
>
> Yes, I see what you mean here.  There is ambiguity on how to interpret the
> dimensionality of the colors array -- should it be construed as RGBa
> color-specs, or is it an array-of-arrays of colors for multiple y-curves?
> I'll file a ticket on this one.
>
> I unfortunately don't have a good work-around for you... :-/
>
> Rick
>
> On Mon, Aug 17, 2015 at 12:21 PM, Alan Brammer <abrammer at albany.edu>
> wrote:
>
>> ​If it's not already in the pipeline, can rgba functionality be added to
>> gsnXYBarChartColors at some point.   In the intermediate time, it could be
>> helpful to add to the documentation that it's colormap or named colors only
>> at this point.  I just went back and forth trying to make this work and
>> failing with no obvious reason.
>>
>> I may be doing something wrong here, but I couldn't make it work.
>>
>>
>> Alan.
>>
>>
>> test script:
>> y := (/ 17., 16., 20., 21., 4./)
>> x := (/0,1,2,3,4/)
>> colors := (/
>> (/0.972549,0,0/),(/0.533333,0.25098,0.12549/),(/0,0,0.972549/),(/0.972549,0.470588,0/),(/0.972549,0,0.972549/)
>> /)
>> bars := True
>> bars at gsnXYBarChart = True
>> bars at trYMinF = 0.
>> bars at gsnXYBarChartColors := colors
>> plot = gsn_csm_xy(wks,x, y, bars)
>>
>>
>>
>> ​
>>
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