# Plot batteery voltage against time, usually for part of one day. set terminal png size 640,240 set output "img/wind20120913-peak.png" set title "GB Grid Wind Peak circa 20120913 (MW)" set grid set xdata time set timefmt x "%Y:%m:%d:%H:%M" set format x "%d/%H:%M" plot "data/wind/20120913-peak.dat" using 1:2 title "" with lines