请问如何使用两个Y轴？当我绘制此图时，我会多次获得键名称不同的点类型的文件名，而文件中没有点。谢谢
set xrange [-0.4:1.8]
set yrange [25:0]
set y2range [17:-8]
set y2tics
set linetype 101 ps 3.0 pt 7 lc rgb "#ff0000"
set linetype 102 ps 2.6 pt 7 lc rgb "#ff2222"
set linetype 103 ps 2.2 pt 7 lc rgb "#ff4444"
set linetype 104 ps 1.8 pt 7 lc rgb "#ff6666"
set linetype 105 ps 1.4 pt 7 lc rgb "#ff8888"
set linetype 106 ps 1.0 pt 7 lc rgb "#ffaaaa"
set linetype 107 ps 0.6 pt 7 lc rgb "#ffcccc"
set linetype 108 ps 0.2 pt 7 lc rgb "#ffeeee"
set linetype 109 ps 3.0 pt 7 lc rgb "#00b3b3"
set linetype 110 ps 2.6 pt 7 lc rgb "#00cccc"
set linetype 111 ps 2.2 pt 7 lc rgb "#00e6e6"
set linetype 112 ps 1.8 pt 7 lc rgb "#00ffff"
set linetype 113 ps 1.4 pt 7 lc rgb "#1affff"
set linetype 114 ps 1.0 pt 7 lc rgb "#fffaaa"
set linetype 115 ps 0.6 pt 7 lc rgb "#33ffff"
set linetype 116 ps 0.2 pt 7 lc rgb "#fff7dc"
set border back
plot for [LT=101:108] 'file.txt' axes x1y1 using 2:1 with point lt LT notitle, 'file2.txt' axes x1y2 using 2:($1 + 8.) with linespoints lc rgb 'white' notitle, for [LT=109:116] 'file2.txt' axes xy2 using 2:($1 + 8.) with point lt LT notitle