Legend demo
Create the bar plots and assign the bar colors. Combine the bar handles within the same legend and specify the legend strings. This is done with tiledlayout where you can more easily control the position of a global legend.
rng('default')
x1 = rand(3,8);
x2 = rand(4,10);
fig = figure();
fig.Position(3:4) = [725,420];
tiledlayout(1,2)
nexttile
bh1 = bar(x1,'stacked');
colors1 = mat2cell(lines(numel(bh1)),ones(numel(bh1),1), 3);
set(bh1, {'CData'}, colors1)
nexttile
bh2 = bar(x2,'stacked');
set(bh2,'FaceColor','flat');
colors2 = mat2cell(colorcube(numel(bh2)),ones(numel(bh2),1), 3);
set(bh2, {'CData'}, colors2)
% Define one label per bar handle
legHandles = [bh1, bh2];
labels = ["Cement","Ethylene","Glass","Lime","Gas","Oil","Paper","Vehicles","Coal",...
"Ammonia","Shale Gas","NRMM","Foo","Bar","Other","Gluposti","Waste","Refining"];
lg = legend(legHandles,labels,'Orientation','Horizontal','NumColumns',6);
lg.Layout.Tile = 'North';
Colorbar demo
rng('default')
x1 = rand(3,8);
x2 = rand(4,10);
fig = figure();
fig.Position(3:4) = [725,420];
tiledlayout(1,2)
nexttile
bh1 = bar(x1,'stacked');
colors1 = mat2cell(lines(numel(bh1)),ones(numel(bh1),1), 3);
set(bh1, {'CData'}, colors1)
nexttile
bh2 = bar(x2,'stacked');
set(bh2,'FaceColor','flat');
colors2 = mat2cell(colorcube(numel(bh2)),ones(numel(bh2),1), 3);
set(bh2, {'CData'}, colors2)
% Define one label per color
allColors = [vertcat(colors1{:}); vertcat(colors2{:})];
labels = ["Cement","Ethylene","Glass","Lime","Gas","Oil","Paper","Vehicles","Coal",...
"Ammonia","Shale Gas","NRMM","Foo","Bar","Other","Gluposti","Waste","Refining"];
% Combine bar color and use them to define the colormap
ax = gca;
ax.Colormap = allColors;
cb = colorbar();
cmapInterval = 1/size(allColors,1);
cb.Ticks = cmapInterval/2 : cmapInterval : 1;
cb.TickLabels = labels;
