How to change the color range on bar chart

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);

Answer 1

[Ashwin]

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

[endystrike]

Hello Ashwin,

thanks a lot for your reply!

Unfortunately I'm still on version 2019a and therefore I cannot use "colororder" function. Is it available any alternative for versions prior to 2019b?

Thanks

[Ashwin]

You could also use the CData feature to make the modifications that you require.

This answer should help you out with its usage:

https://www.mathworks.com/support/search.html/answers/357752-explicit-color-and-legend-control-bars-in-stacked-bar-plot.html?q=&fq=asset_type_name:answer%20category:matlab/line-plots&page=1

[endystrike]

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);

[Ashwin]

Glad to be of help!