#
# Two plot style options "with hsteps link" and "with hsteps pillar"
# can be combined to create a stacked histogram with connecting lines
# between category boundaries.
#

set title "Stacked histogram constructed from plot style hsteps"

$data <<EOD
1 2018 60 30
2 2019 65 35
3 2020 61 25
4 2021 57 33
5 2022 65 40
6 2023 62 20
EOD

set xrange [0:7]
set yrange [0:80]
unset ytics
set xtics scale 0
set border 3 lw 2 front
set bmargin 4
unset key

set style line 11 linecolor 'gray50' linewidth 2 dashtype (4,10) 
set style line 12 linecolor variable linewidth 2 dashtype solid

plot $data using 1:3:(0.5):xtic(2) ls 11 with hsteps link, \
     $data using 1:3:(0.5):1       ls 12 with hsteps pillar fs solid 0.5 border, \
     $data using 1:4:(0.5)         ls 11 with hsteps link, \
     $data using 1:4:(0.5):1       ls 12 with hsteps pillar fs transparent pattern 1 border


Click here for minimal script to generate this plot