set terminal png transparent size 640,240 set size 1.0,1.0 set output 'commits_by_year_month.png' unset key set yrange [0:] set xdata time set timefmt "%Y-%m" set format x "%Y-%m" set xtics rotate set bmargin 5 set grid y set ylabel "Commits" plot 'commits_by_year_month.dat' using 1:2:(0.5) w boxes fs solid