dcav-stats/plot.rb

users = ["christoffermadsen","jmaa","jacob","alexander"]
log_dir = "./log/"
plotstring = %Q[set terminal 'png' size 1000,400
set output "/home/christoffermadsen/public_html/img/screenshot_count.png"
set title "Screenshot count"
set key bottom outside

set style line 1 lt 1 lw 2 pt 7 ps 0.4

set xdata time
set timefmt "%s"
set format x "%m/%d"
set yrange [0:500]
set xlabel "Time"
set ylabel "Count"
set ytics 100
set mytics 2
set grid ytics mytics xtics
set grid
set xtics 432000

plot ]

users.each do |user|
  colour = "%06x" % (rand * 0xffffff)
  plotstring += %Q["log/#{user}.log" using 1:2 with lines ls 1 lc rgb '##{colour}' t "#{user}", \\\n]
end
output = File.open("plotscript","w")
output << plotstring
output.close