How do I add lines between individual scatter points in a bar graph?

The picture of the plot is attached. I need to add lines between the individual scatter points within each bar group, so there will be 4 lines for each bar group.

Here is the part of the code for the scatter plot:

    % code
for i = 1:12
    scatter(x(i).* ones(length(num(i,:)),1),num(i,:),'*','MarkerEdgeColor',[0.20 0.21 0.22])
end;

Answer 1

[KSSV]

figure
hold on
N = 10 ;
bar(rand(10,1))
plot(repelem(4.5,1,N),linspace(0,1,N))

[Evgeniia Diachek]

This code doesn't quite work. I have 8 individual scatter points in a group of bars. I need to connect them, so there are 4 lines in each bar group.

[KSSV]

I gave you a pseudo code on plotting a line on bar graph. You have to extend it in your case.