change datatip for segments of stacked bar charts

Hi everyone! ;)

I'm struggling in trying to change data tips for segments of a stacked bar chart (and of course I'd like to change the format and label also for X data of the data tip itself).

From the following codes, I'd like to:

• change the Y segment label to the corresponding name of the ticker from "all_i(idx)" (of course I'd do it for each element of included in "idx" vector)
• change the format value of Y segment to '%.2f%%'
• to change the label "X" to "Date"
• change the format of the corresponding date as 'dd/MM/yyyy'

Two important notes:

• "date_ax" is a datetime vector
• "all_i" is a string vector
• "idx" is a numeric vector

I'm sorry but reading the data tip help I could do everything on other types of charts, but I'm facing issues with stacked bar charts... :(

Thanks a lot for your precious help! :)

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,'sort','hue',...
    'exc',[0,0,0; 1,1,1; 0.59,0.54,0.54; 0.30,0.24,0]);
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');
legend(all_i(idx),'Location','northwest');

Answer 1

[Seth Furman]

Take a look at the documentation for creating custom data tips.

https://www.mathworks.com/help/matlab/creating_plots/create-custom-data-tips.html

x = datetime('2020-01-01'):days(1):datetime('2020-01-03');
x.Format = 'dd/MM/uuuu';
y = [2 2 3; 2 5 6; 2 8 9; 2 11 12];
b = bar(x,y,'stacked','BarWidth',1,'FaceColor','flat','LineStyle','none');
templates = [b.DataTipTemplate];
names = ["Name1","Name2","Name3","Name4"];
for i = 1:length(templates)
    template = templates(i);
    template.DataTipRows(1).Label = 'Date:';
    template.DataTipRows(3).Label = names(i)+":";
    template.DataTipRows(3).Format = '%.2f%%';
end