# Double y-axes set key autotitle columnhead # use first line as column title set ytics autofreq tc lt 1 set y2tics autofreq tc lt 2 plot "data.txt" using 1 w l linetype 1, "" using 2 w l linetype 2 axes x1y2
# Multiplot set multiplot layout 4,1 rowsfirst # 4 rows, 1 column set yrange [200:450] plot "long_term_trend.txt" using 1 w l set yrange [350000:430000] plot "long_term_trend.txt" using 3 w l set yrange [28.9:29.1] plot "long_term_trend.txt" using 4 w l set yrange [41.9:42.1] plot "long_term_trend.txt" using 5 w l unset multiplot
See this for a more detailed guide.