How do i plot many short horizontal lines when a value is available?

So I have a signal X of length N. Now I have 2 vectores A and B which are time instants on the signal X. i calculate some quotient based on the differences between A and B and store in Q. I want to plot Q on the Y-axis, and x- axis will have the time axis of the signal. Now for every location on the signal where I do some Bi-Ai, I want to draw a horizontal line (horizontal marker), and its y value will correspond to the element in Q.

Can someone please help me or give me an idea?

X % some signal

A= 100x1; %selected time instants on X
B= 120x1; %selected time instants on X

N= max([length(A) length(B)])
for i=1:N
    Q(i)= B(i)-A(i)
end

Answer 1

[Dyuman Joshi]

%random data
A=randi(100,1,10)

A = 1×10

41 54 69 89 78 80 72 21 24 62

B=randi(100,1,12)

B = 1×12

63 63 76 23 28 90 52 86 22 16 41 58

%You can not use max, because A has less elements than B elements
N=min([numel(A) numel(B)]);
for i=1:N
    Q=B(i)-A(i);
    %two x coordinates (different values, start and end point, order doesn't matter)
    %two y coordinates (same value)
    plot([A(i) B(i)],[Q Q])
    hold on
end
axis fill