Plotting labeled intervals in matplotlib/gnuplot

Question

I have a data sample which looks like this:

a 10:15:22 10:15:30 OK
b 10:15:23 10:15:28 OK
c 10:16:00 10:17:10 FAILED
b 10:16:30 10:16:50 OK

Answer 1

gnuplot with vector solution

Minimized from: http://gnuplot.sourceforge.net/demo_5.2/gantt.html

main.gnuplot

#!/usr/bin/env gnuplot

$DATA << EOD
1 1 5
1 11 13
2 3 10
3 4 8
4 7 13
5 6 15
EOD

set terminal png size 512,512
set output "main.png"
set xrange [-1:]
set yrange [0:]
unset key
set border 3
set xtics nomirror
set ytics nomirror
set style arrow 1 nohead linewidth 3
plot $DATA using 2 : 1 : ($3-$2) : (0.0) with vector as 1, \
     $DATA using 2 : 1 : 1 with labels right offset -2

GitHub upstream.

Output:

You can remove the labels by removing the second plot command line, I added them because they are useful in many applications to more easily identify the intervals.

The Gantt example I linked to shows how to handle date formats instead of integers.

Tested in gnuplot 5.2 patchlevel 2, Ubuntu 18.04.