set yrange [0:]
set ytics nomirror
set y2range [0:]
set y2tics nomirror

set ylabel "Loss"
set y2label "Accuracy"

plot "train.dat" with lines title "training", "test.dat" using 1:3 with linespoint title "testing", "test.dat" using 1:2 with linespoints axes x1y2 title "accuracy"
pause 5 
reread