How to change the color range on bar chart

Question

endystrike 2020-6-18

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https://ww2.mathworks.cn/matlabcentral/answers/550353-how-to-change-the-color-range-on-bar-chart

评论： Ashwin 2020-6-18

采纳的回答： Ashwin

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Hi everyone!

Is it possible to change the color range of this bar chart?

Sometimes assets' colors seems to be too similar and it's difficult to understand to which of them each color is referred to...

Thanks a lot! :)

idx = find(sum(stocks_glob_perc)~=0);
alloc_f = figure('units','normalized','position',[0 0 1 1]); %#ok<NASGU>
ax = bar(date_ax,100*stocks_glob_perc(1:end-1,idx),'stacked','BarWidth',1);
xlim([date_ax(FirstDayOfPtot)-5 date_ax(end)+5]);
set(gca,'XTick',date_ax(EoYi+1));
ytickformat('percentage');
ylim([0 100]);
datetick('x','mm/YYYY','keeplimits','keepticks');
hlegx = legend(all_i(idx),'Location','southoutside','Orientation','horizontal','FontSize',13);

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Answer 1

Ashwin 2020-6-18

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https://ww2.mathworks.cn/matlabcentral/answers/550353-how-to-change-the-color-range-on-bar-chart#answer_453042

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My understanding is that you require a way to modify the color range of the bar graph to distinctly identify the colors being used.

A direct modification of the range may lead to the same issue you’re facing. However, using the colororder function will allow you to mention desired RGB/hex values, allowing to maintain their clear distinction.

a = [1,3,6;2,5,6;8,2,1]; 
H=bar(a, 'stacked'); 
newColors = ['#eb9234' 
             '#34eb86' 
             '#d034eb']; 
colororder(newColors); 

Refer to the below link for more information on how to use colororder: https://www.mathworks.com/help/matlab/ref/colororder.html

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endystrike 2020-6-18

编辑：endystrike 2020-6-18

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Thanks a lot Ashwin,

I solved combining your answer with the usage of this function found on File Exchange... ;)

https://it.mathworks.com/matlabcentral/fileexchange/70215-maximally-distinct-color-generator

alloc_f = figure('units','normalized','position',[0 0 1 1]); %#ok<NASGU>
ax = bar(date_ax,100*stocks_glob_perc(1:end-1,idx),'stacked','BarWidth',1,'FaceColor','flat');
newColors = maxdistcolor(length(idx),@srgb_to_Jab);
for k=1:length(idx)
    ax(k).CData = newColors(k,:);
end
xlim([date_ax(FirstDayOfPtot)-5 date_ax(end)+5]);
set(gca,'XTick',date_ax(EoYi+1));
ytickformat('percentage');
ylim([0 100]);
datetick('x','mm/YYYY','keeplimits','keepticks');
hlegx = legend(all_i(idx),'Location','southoutside','Orientation','horizontal','FontSize',13);