plot_histogram.plg

clear
reset
unset key
# Make the x axis labels easier to read.
set xtics rotate out
set key autotitle columnheader
# Select histogram data
set style data histogram
# Give the bars a plain fill pattern, and draw a solid line around them.
set style fill solid border
set style histogram rowstacked
set boxwidth 0.6 relative
set terminal pngcairo size 1000,1000
set output 'histogram.png'
plot for [COL=2:4] filename using COL:xticlabels(1) title columnheader