# Plot all-time PV values, one per line. set terminal png set output "out/monthly/Eall.png.tmp" set title "2008 onwards PV kWh/d" set grid set xdata time set timefmt "%Y-%m-%d" set format x "%Y" plot "out/daily/PVEalldailykWh+smoothed.dat" \ using 1:2 title "raw" with lines, \ "" using 1:3 smooth bezier title "smooth" with lines lw 2