Question

我想用可见光分布曲线在可见光区域制作彩虹填充框。我不知道如何用彩虹填充这个盒子......

我设置了一个类似

的框

Dim query = (From t1 In table1
             Join t2 In table2 On t1.ID Equals t2.ID
             Select t1, t2).ToList()

For Each val In query
    val.t1.t2property = val.t2
Next

和

set object 1 rectangle from 3600,0 to 8200,3.6 fs solid 0.4

用于着色。但只有我能做的就是用一种颜色填充它。

我看到了一些用于绘图的着色演示，比如pm3d或某些调色板，但它没有用调色板将它们放到obj着色上。

来自wiki，我想要那个彩虹盒：

Answer 1

我实际上想去年做同样的情节。我找不到gnuplot解决方案（我很确定存在...），最后我写了一个带有awk部分的脚本来生成一个RGB颜色的文件，范围为波长，然后用gnuplot和impulses lc rgb variable绘制那些波长。我使用了几个SO问题的代码，但不记得原始来源。无论如何，使用下面的代码：

#!/bin/bash

        seq 4000 1 7000 | awk '{
            wv=$1/10
            if(wv < 380){
                    rd = -(380. - 440.) / (440. - 380.)
                    gr = 0.0
                    bl = 1.0}
            if(wv >= 380 && wv < 440){
                    rd = -(wv - 440.) / (440. - 380.)
                    gr = 0.0
                    bl = 1.0}
            if(wv >= 440 && wv < 490){
                    rd = 0.0
                    gr = (wv - 440.) / (490. - 440.)
                    bl = 1.0}
            if(wv >= 490 && wv < 510){
                    rd = 0.0
                    gr = 1.0
                    bl = -(wv - 510.) / (510. - 490.)}
            if(wv >= 510 && wv < 580){
                    rd = (wv - 510.) / (580. - 510.)
                    gr = 1.0
                    bl = 0.0}
            if(wv >= 580 && wv < 645){
                    rd = 1.0
                    gr = -(wv - 645.) / (645. - 580.)
                    bl = 0.0}
            if(wv >= 645 && wv <= 730){
                    rd = -(wv - 780.) / (780. - 645.)
                    gr = 0.0
                    bl = 0.0}
            if(wv > 730){
                    rd = -(730 - 780.) / (780. - 645.)
                    gr = 0.0
                    bl = 0.0}
            rgb=int(255*rd)*2^16+int(255*gr)*2^8+int(255*bl)
            printf("%7.4f %f %f %f %f %3d %3d %3d %10d\n",$1/10000,41,rd,gr,bl,rd*255,gr*255,bl*255,rgb)
        }' > rgb.tmp



gnuplot << GNU

set term pdf size 7,7 font "courier,16"
set output 'bblaw.pdf'
set encoding iso
set border -1 lw 0.90
set tics front


set style line 1 pt 7 ps 1.50 lt -1 lw 2.5 lc "#608DB6CD"
set style line 2 pt 5 ps 1.50 lt -1 lw 2.5 lc "#60EE6363"
set style line 3 pt 9 ps 1.00 lt -1 lw 2.5 lc "#FFB90F"
set style line 4 pt 5 ps 1.50 lt -1 lw 2.5 lc "#EEEEEE"

set xrange [0.10:1.65]
set yrange [0:41]

set  ytics 5
set mytics 5
set  xtics 0.25
set mxtics 5
set format x "%4.2f"

set ylabel "Intensity (kW . sr^{-1} . m^{-2} . {/Symbol m}m^{-1})"
set xlabel "Wavelength ({/Symbol m}m)"

set label "5000K"       at 0.50,14.0 front font ",15"
set label "5500K"       at 0.45,21.5 front font ",15"
set label "5778K (Sun)" at 0.40,27.0 front font ",15"
set label "6000K"       at 0.45,32.5 front font ",15"
set label "8000K"       at 0.22,39.0 front font ",15"

unset key

# length unit is micrometre
c=3e14 # speed of light
h=6.626e-22 # Planck constant
k=1.38e-11 # Boltzmann constant

# Planck curves
p1(x)=1e-6*2*h*c**2/(x**5*(exp(h*c/(x*k*5000))-1))
p2(x)=1e-6*2*h*c**2/(x**5*(exp(h*c/(x*k*5500))-1))
p3(x)=1e-6*2*h*c**2/(x**5*(exp(h*c/(x*k*5778))-1))
p4(x)=1e-6*2*h*c**2/(x**5*(exp(h*c/(x*k*6000))-1))
p5(x)=1e-6*2*h*c**2/(x**5*(exp(h*c/(x*k*8000))-1))

plot "rgb.tmp" u 1:2:9 not w imp lc rgb variable lw 0.5,\
     p1(x) lw 6, p2(x) lw 6, p3(x) lw 6, p4(x) lw 6, p5(x) lw 6

GNU

rm rgb.tmp

你会得到这样的东西：

如果在终端上运行此bash脚本，它应生成pdf文件并删除在此过程中创建的所有临时文件。请注意，您可以在开头更改awk脚本，以防您想稍微移动色阶。在这种特殊情况下，我通过编辑第3行的seq命令将波长范围限制在4000：7000埃。

如果此解决方案适合您，请告诉我。如果是这样，我建议您在问题中添加awk标记。

Answer 2

它是一个手动解决方案，但一堆垂直线怎么样。这是一个开始。该线宽适用于1200,900

的绘图窗口

set arrow 1 from 0.4,0 to 0.4, 50 nohead lc rgb '#8B008B#' lw 3.5
set arrow 2 from 0.405,0 to 0.405, 50 nohead lc rgb '#7000aF#' lw 3.5
set arrow 3 from 0.41,0 to 0.41, 50 nohead lc rgb '#4800FF#' lw 3.5
set arrow 4 from 0.415,0 to 0.415, 50 nohead lc rgb '#3000FF#' lw 3.5
set arrow 5 from 0.42,0 to 0.42, 50 nohead lc rgb '#1800FF#' lw 3.5
set arrow 6 from 0.425,0 to 0.425, 50 nohead lc rgb '#0000FF#' lw 3.5
set arrow 7 from 0.43,0 to 0.43, 50 nohead lc rgb '#0018FF#' lw 3.5
set arrow 8 from 0.435,0 to 0.435, 50 nohead lc rgb '#0030FF#' lw 3.5
set arrow 9 from 0.44,0 to 0.44, 50 nohead lc rgb '#0048FF#' lw 3.5
set arrow 10 from 0.445,0 to 0.445, 50 nohead lc rgb '#0060FF#' lw 3.5
set arrow 11 from 0.45,0 to 0.45, 50 nohead lc rgb '#0078FF#' lw 3.5
set arrow 12 from 0.455,0 to 0.455, 50 nohead lc rgb '#0088FF#' lw 3.5
set arrow 13 from 0.46,0 to 0.46, 50 nohead lc rgb '#0090FF#' lw 3.5
set arrow 14 from 0.465,0 to 0.465, 50 nohead lc rgb '#00a0FF#' lw 3.5
set arrow 15 from 0.47,0 to 0.47, 50 nohead lc rgb '#00b8FF#' lw 3.5
set arrow 16 from 0.475,0 to 0.475, 50 nohead lc rgb '#00d0FF#' lw 3.5
set arrow 17 from 0.48,0 to 0.48, 50 nohead lc rgb '#00fe8FF#' lw 3.5
set arrow 18 from 0.485,0 to 0.485, 50 nohead lc rgb '#00FFFF#' lw 3.5
set arrow 19 from 0.49,0 to 0.49, 50 nohead lc rgb '#7CFFa0#' lw 3.5
set arrow 20 from 0.495,0 to 0.495, 50 nohead lc rgb '#7CFF80#' lw 3.5
set arrow 21 from 0.5,0 to 0.5, 50 nohead lc rgb '#7CFF60#' lw 3.5
set arrow 22 from 0.505,0 to 0.505, 50 nohead lc rgb '#7CFF40#' lw 3.5
set arrow 23 from 0.51,0 to 0.51, 50 nohead lc rgb '#7CFF20#' lw 3.5
set arrow 24 from 0.515,0 to 0.515, 50 nohead lc rgb '#7CFF10#' lw 3.5
set arrow 25 from 0.52,0 to 0.52, 50 nohead lc rgb '#7CFF00#' lw 3.5
set arrow 26 from 0.525,0 to 0.525, 50 nohead lc rgb '#80FF00#' lw 3.5
set arrow 27 from 0.53,0 to 0.53, 50 nohead lc rgb '#88FF00#' lw 3.5
set arrow 28 from 0.535,0 to 0.535, 50 nohead lc rgb '#90FF00#' lw 3.5
set arrow 29 from 0.54,0 to 0.54, 50 nohead lc rgb '#98FF00#' lw 3.5
set arrow 30 from 0.545,0 to 0.545, 50 nohead lc rgb '#a0FF00#' lw 3.5
set arrow 31 from 0.55,0 to 0.55, 50 nohead lc rgb '#a8FF00#' lw 3.5
set arrow 32 from 0.555,0 to 0.555, 50 nohead lc rgb '#b0FF00#' lw 3.5
set arrow 33 from 0.56,0 to 0.56, 50 nohead lc rgb '#c0FF00#' lw 3.5
set arrow 34 from 0.565,0 to 0.565, 50 nohead lc rgb '#d0FF00#' lw 3.5
set arrow 35 from 0.57,0 to 0.57, 50 nohead lc rgb '#e0FF00#' lw 3.5
set arrow 36 from 0.575,0 to 0.575, 50 nohead lc rgb '#f0FF00#' lw 3.5
set arrow 37 from 0.58,0 to 0.58, 50 nohead lc rgb '#FFFF00#' lw 3.5
set arrow 38 from 0.585,0 to 0.585, 50 nohead lc rgb '#FFcF00#' lw 3.5
set arrow 39 from 0.59,0 to 0.59, 50 nohead lc rgb '#FFA500#' lw 3.5
set arrow 40 from 0.595,0 to 0.595, 50 nohead lc rgb '#FFA500#' lw 3.5
set arrow 41 from 0.6,0 to 0.6, 50 nohead lc rgb '#FF9800#' lw 3.5
set arrow 42 from 0.605,0 to 0.605, 50 nohead lc rgb '#FF8000#' lw 3.5
set arrow 43 from 0.61,0 to 0.61, 50 nohead lc rgb '#FF7000#' lw 3.5
set arrow 44 from 0.615,0 to 0.615, 50 nohead lc rgb '#FF6000#' lw 3.5
set arrow 45 from 0.62,0 to 0.62, 50 nohead lc rgb '#FF5000#' lw 3.5
set arrow 46 from 0.625,0 to 0.625, 50 nohead lc rgb '#FF4000#' lw 3.5
set arrow 47 from 0.63,0 to 0.63, 50 nohead lc rgb '#FF3800#' lw 3.5
set arrow 48 from 0.635,0 to 0.635, 50 nohead lc rgb '#FF3000#' lw 3.5
set arrow 49 from 0.64,0 to 0.64, 50 nohead lc rgb '#FF2000#' lw 3.5
set arrow 50 from 0.645,0 to 0.645, 50 nohead lc rgb '#FF1000#' lw 3.5
set arrow 51 from 0.65,0 to 0.65, 50 nohead lc rgb '#FF0000#' lw 3.5
set arrow 52 from 0.655,0 to 0.655, 50 nohead lc rgb '#FF0000#' lw 3.5
set arrow 53 from 0.66,0 to 0.66, 50 nohead lc rgb '#f00000#' lw 3.5
set arrow 54 from 0.665,0 to 0.665, 50 nohead lc rgb '#e00000#' lw 3.5
set arrow 55 from 0.67,0 to 0.67, 50 nohead lc rgb '#d00000#' lw 3.5
set arrow 56 from 0.675,0 to 0.675, 50 nohead lc rgb '#c00000#' lw 3.5
set arrow 57 from 0.68,0 to 0.68, 50 nohead lc rgb '#b00000#' lw 3.5
set arrow 58 from 0.685,0 to 0.685, 50 nohead lc rgb '#a00000#' lw 3.5
set arrow 59 from 0.69,0 to 0.69, 50 nohead lc rgb '#900000#' lw 3.5
set arrow 60 from 0.695,0 to 0.695, 50 nohead lc rgb '#800000#' lw 3.5
set arrow 61 from 0.7,0 to 0.7, 50 nohead lc rgb '#700000#' lw 3.5

如何在GNUPLOT中制作彩虹盒

2 个答案: