set terminal png font arial 8 size 600,300
set output 'merge.png'
set grid
set ytics border in scale 1,0.5 mirror norotate  offset character 0, 0, 0
set ytics (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
set title "Merging times"
set xlabel "value of parameter p"
set ylabel "seconds per sort run"
set xrange [ 0.0000 : 25.000 ] # Anzahl an Messungen
set yrange [ 0.0000 : 12.000 ] # Sekunden pro sort
set datafile separator ","
plot 'merge.dat' using 0:1 notitle with points, \
	 'merge.dat' using 0:1 title "interpolate" with lines, \
	 'merge.dat' using 0:1 smooth csplines title "cspline" with lines