Here is the heatmap solution, but unfortunately it doesn't return the total time in bar.
clc;
clear;
close all;
M1 = [ones(1,6), zeros(1,4), ones(1,7), zeros(1,3)];
M2 = [zeros(1,5), ones(1,6), zeros(1,5), ones(1,4)];
t1 = datetime(2020,10,26,0,0,0);
t2 = datetime(2020,10,26,19,0,0);
t = (t1 + hours(0:19));
h = heatmap(t, {'Machine 1', 'Machine 2'}, [M1; M2]);
There is a helpful link at Stackoverflow, if you'd like to make it using barh. Also, it is possible to overlay the text with the color background and the total number, but you'd have to generalise the calculation and location, width and height to place it. This is totally doable and could be worthy of file exchange submission.
