set xlabel "time [s]"
set ylabel "Window size [pkts]"
set key bel
plot "Fairness2Window0.tr" u ($1):($2) t "TCP connection: 0-1" w lp lt rgb "blue", "Fairness2Window1.tr" u ($1):($2) t "TCP connection: 0-2" w lp lt rgb "red"

set term png
set output "fairness2_wnd.png" 
replot
pause -1