gnuplot画heatmap图（灰色系）

set cbrange [0:2] set palette defined (0 "gray100",20 "gray80",40 "gray60",60 "gray40",\     80 "gray20",100 "gray0",101 "grey0") plot 'test.dat' u 1:2:3 w image reset 效果如图： 生成"test.dat"的Fortran程序：  

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