gnuplot彩色盒标签位置

Question

我使用的视图地图功能与数据集，往往是整数。当范围很小时，我根据整个值的范围来限制颜色的数量。我正在寻找一个选项，将在每个彩色盒颜色范围中心的价值标签。例如，我希望"500“出现在黄色中心而不是顶部，我希望"498”出现在黑色中心而不是底部。

Answer 1

# colorbox centered at screen x=0.9, 0.1 < screen y < 0.9
# known range [0:10] allows us to calculate tic positions
# 
set colorbox user origin screen 0.85, 0.1 size 0.1, 0.8
set cbrange [0:10]

# custom tic labels for the colorbox
unset cbtics
set style textbox opaque border lc "black" margins 0,0

do for [i = 1:9] {
    set label i at screen 0.9, (0.1 + 0.08*i)
    set label i sprintf("%03d",i) center boxed front
}

# some function for which the cbrange makes sense
set palette cubehelix 
set sample 101; set isosample 101; set xyplane 0
f(x,y) = 10*sinc(sqrt(x*x + y*y))

splot f(x,y) with pm3d

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