Graphing ping output with gnuplot

cat ping198.log | awk '{print $5","$7}'| sed -e 's/icmp_seq=//g' -e 's/time=//g' > ping198.csv

set title 'Tiempos de respuesta de ping'
set terminal png
set output 'ping198.png'
set style data linespoints
set datafile separator ","
set xlabel "Secuencia"
set ylabel "Tiempo"
plot 'ping198.png' using 1:2