set term png
set out 'trace.png'
set xlabel "time (sec)"
set ylabel "packet"
set y2tics

plot [2595:2604] 'f1' u 1:2 w linesp title "cwnd size" axes x1y1,'ploss' u 1:3 w i title "# packets transmitted into the bottleneck" axes x1y1, 'f1' u 1:5 w lines title "# of duplicate acks" axes x1y1, 'f1' u 1:3 w l title "ack seq" axes x1y2, 'f1' u 1:4 w l title "sent seq" axes x1y2