set terminal png size 800,450 set key off set timefmt "%Y-%m-%d" set xdata time set xrange ["2004-01-01":"2017-12-31"] set format x "%Y" set xtics "2004-01", 12*2629746, "2018-01" set ytics 0.01 set format y "%4.2f" set grid ytics plot "versions.txt" using 1:4 with impulses