f = "out.txt"
set term pdf color size 20cm,15cm
set output "out.pdf"
set ylabel "Size in mb"
set xlabel "1:punkt, 2:repp, 3:hunpos, 4:malt"
set yrange [0:502]
set xrange [0:4]
set xtics (1,2,3,4)
set ytics 0, 10
set style line 1 lt 2 pt 1 lc rgbcolor "blue"

set style increment user

set key out horiz center top

plot f using 1:2 with lp title "disk space growth"