你如何在 gnuplot 中绘制条形图? [英] How do you plot bar charts in gnuplot?

问题描述

如何在带有文本标签的 gnuplot 中绘制条形图?

How do you plot bar charts in gnuplot with text labels?

推荐答案

简单条形图:

set boxwidth 0.5
set style fill solid
plot "data.dat" using 1:3:xtic(2) with boxes

数据.dat:

0 label       100
1 label2      450
2 "bar label" 75

如果您想以不同的方式设置条形图，您可以执行以下操作:

set style line 1 lc rgb "red"
set style line 2 lc rgb "blue"

set style fill solid
set boxwidth 0.5

plot "data.dat" every ::0::0 using 1:3:xtic(2) with boxes ls 1, 
     "data.dat" every ::1::2 using 1:3:xtic(2) with boxes ls 2

如果你想为每个条目做多个条形:

数据.dat:

0     5
0.5   6


1.5   3
2     7


3     8
3.5   1

gnuplot:

set xtics ("label" 0.25, "label2" 1.75, "bar label" 3.25,)

set boxwidth 0.5
set style fill solid

plot 'data.dat' every 2    using 1:2 with boxes ls 1,
     'data.dat' every 2::1 using 1:2 with boxes ls 2

如果您想变得棘手并使用一些简洁的 gnuplot 技巧:

Gnuplot 具有可用作着色索引的伪列:

Gnuplot has psuedo-columns that can be used as the index to color:

plot 'data.dat' using 1:2:0 with boxes lc variable

您还可以使用函数来选择您想要的颜色:

Further you can use a function to pick the colors you want:

mycolor(x) = ((x*11244898) + 2851770)
plot 'data.dat' using 1:2:(mycolor($0)) with boxes lc rgb variable

注意:您必须添加一些其他基本命令才能获得与示例图像相同的效果.

Note: you will have to add a couple other basic commands to get the same effect as the sample images.

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