How to create stacked histogram with arrays of different length

Basically I have column arrays with multiple observations, each belonging to a different category but every element has a different lenght. I want to be able to do something like this, whit each color representing a array (or category).

I tried to concatenate the arrays into a bigger array and then stacking bars but didn't help beacuse of the lenght issue.

[Martin Roth]

Better late than never. Check if this solution fits for your problem:

% Create dummy data

A=-20+40*rand(500,1);

B=randn(400,1)*20;

Total=[A;B];

Steps=[0,numel(A),numel(B)];

[N,edges,bins] = histcounts(Total);

% Plot stacked histogram

figure;

colors=lines;

hold on

for i=1:length(Steps)-1

histogram(Total(1+Steps(i):end),'BinEdges',edges,'FaceColor',colors(i,:));

hold on

end

[ch_tsai]

I was trying to find a similar function and found this answer. Your code looks good, thank you! I would like to make it more generalized. For example, if there are more than two set of data, in the last part of your for loop, it's better to write in this way.

    % Copy from your code--
    % Create dummy data
    A=-20+40*rand(500,1);
    B=randn(400,1)*20;
    C=-25+40*rand(500,1);
    D=randn(400,1)*10;
    Total=[A;B;C;D];
    
    Steps=[0,numel(A),numel(B),numel(C),numel(D)];
    [N,edges,bins] = histcounts(Total);  
    
    % Plot stacked histogram   
    figure;
    colors=lines;
    hold on
    
    for i=1:length(Steps)-1
        histogram(Total(1+sum(Steps(1:i)):end),'BinEdges',edges,'FaceColor',colors(i,:));%sum of Steps(1:i) was added
        hold on
    end