set term svg fsize 18 background rgb "white"
set out "plot.svg"
set key out
set tics out
set xlabel "x"
plot \
 "out.txt" using 1:2 with linespoints pt 7 ps 0.5 title "sin" \
,"out.txt" using 1:3 with linespoints pt 5 ps 0.5 title "cos" \
,"out.txt" using ($1):(0) w p pt 7 ps 0.1 not \