在 gnuplot 中管理调色板指示器

Question

我想问一下是否有人知道如何在 gnuplot 中管理调色板指示器，我希望它适合我的颜色 (12) 而不是自动添加

我的密码是

 set palette model HSV 
 set palette rgb 3,2,2 
 set palette maxcolors 12 
 set view map
 set size square
 set key off
 set title "Neural network output (fitted curve)"
 set xlabel "x"
 set ylabel "y"
 set zlabel "z"
 set xrange [  -7.6625930750000002  :   27.166801390000000      ]
 set yrange [  0.35422432799999998  :   30.163194489999999      ]
 set zrange [  -55.934824620000001  :   2.4059901000000002E-002 ]
 set grid
 set terminal png size 1200,900
 set output "output/fitted_curve.png "
 splot "output/plot_data_pl.txt " with points palette pt 7 ps 1

Answer 1

为了获得最大的灵活性，您应该定义自己的palette。
这是我曾经为获得具有 7 种不同颜色的图所做的。因此，我还可以定义哪种颜色代表给定的值范围。

set palette defined (0 "black",\
                     0.5 "black",\
                     0.5 "red",\
                     1.5 "red",\
                     1.5 "orange-red",\
                     2.5 "orange-red",\
                     2.5 "orange",\
                     3.5 "orange",\
                     3.5 "yellow",\
                     4.5 "yellow",\
                     4.5 "light-green",\
                     5.5 "light-green",\
                     5.5 "green",\
                     6.5 "green")

因此，您实际上必须定义您希望颜色跨越的值。
当然，您可以为您的颜色使用 rgb 定义。 gnuplot 定义的颜色列表是 here.

为了完整起见，这里是我使用的全部代码：

set view map
set pm3d

set term pngcairo crop font 'lmroman10,32' size 1152,864
set border lw 2
set palette defined (0 "black", 0.5 "black", 0.5001 "red", 1.5 "red", 1.5001 "orange-red", 2.5 "orange-red", 2.5001 "orange", 3.5 "orange", 3.5001 "yellow", 4.5 "yellow", 4.5001 "light-green", 5.5 "light-green", 5.5001 "green", 6.5 "green")
set xlab 'time step ' offset 0,1
set xtics 2500 offset 0,0.65
set ylab 'position [cell]' offset +.5,0
set cblab 'velocity [cells/(time step)]' offset -.8,0
set cbtics offset -1.2,0
set xrange[100000:110000]
set yrange[0:10000]
set cbrange[0:6.5]

set style line 1 lt 1 lc rgb "blue" lw .85 pt 6 ps .6

splot '6.csv' u (()):():() w p palette t '', 'data.csv' u (()):():(*0) w l ls 1 t '',  'data2.csv' u (()):():(*0) w l ls 1 t ''

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