如何在gnuplot中使用列标题设置轴标签? [英] How do I set axis label with column header in gnuplot?

问题描述

我的问题很简单.假设我有一个带有列标题的数据文件，如下所示

My question is very simple. Suppose I have a datafile with column headers, like as follows

first second
1 1 
2 1
3 6
4 9

在gnuplot中，我如何做到这一点，以便使用列标题作为轴标签来绘制数据文件?例如通过致电

In gnuplot how do i make it so that the datafile is plotted using the column header as axis label? e.g. by calling

plot datafile using 1:2

我得到标为first的xaxis和标为second的yaxis?

i get the xaxis labeled first and the yaxis labeled second?

我确实知道可以通过set key auto title column head将列标题用作键条目，但这并不是我想要的.

edit: I do know that I can use the column header as a key entry via set key auto title column head, however that's not quite what I'm looking for.

推荐答案

要详细说明@andyras的建议，请按以下步骤操作:

To elaborate the suggestion of @andyras, here is how you can do it:

datafile = 'filename.txt'
firstrow = system('head -1 '.datafile)
set xlabel word(firstrow, 1)
set ylabel word(firstrow, 2)
plot datafile using 1:2

您必须使用显式的using语句进行绘图，否则gnuplot会抱怨bad data on line 1.

You must plot with the explicit using statement, otherwise gnuplot will complain about bad data on line 1.

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