数据文件：XYZ1931.dat

1、直接生成PNG文件

gunplot script:

gnuplot> set term pngcairo
Terminal type set to 'pngcairo'
Options are ' background "#ffffff" fontscale 1.0 size 640, 480  linewidth 2'
gnuplot> set output 'XYZ1931.png'
gnuplot> set xlabel 'Wavelength(nm)'
gnuplot> set ylabel 'Tristimulus values'
gnuplot> plot "XYZ1931.dat" using 1:2 w l t 'X',
>"XYZ1931.dat" using 1:3 w l t 'Y',
>"XYZ1931.dat" using 1:4 w l t 'Z'
gnuplot> set output
gnuplot> set term wxt

----

生成图像

2、输出epslatex-->编译生成--->ps---->pdf

gnuplot script:

gnuplot> set term epslatex
gnuplot> set output 'XYZ1931.tex'
gnuplot> set xlabel 'Wavelength(nm)'
gnuplot> set ylabel 'Tristimulus values'
gnuplot> plot "XYZ1931.dat" using 1:2 w l t '$\bar{x}(\lambda)$',\
>"XYZ1931.dat" using 1:3 w l t '$\bar{y}(\lambda)$',\
>"XYZ1931.dat" using 1:4 w l t '$\bar{z}(\lambda)$'
gnuplot> set output

生成图像：

pdf格式格式图片：XYZ1931.pdf