如何在gnuplot中为xticlabels提供自定义字符串参数? [英] How do I give custom string argument to xticlabels in gnuplot?

问题描述

让我们说我有一个包含三列的数据文件.我希望能够更改x轴标签.经过一番谷歌搜索后，我发现了xticlabels()，但问题是它似乎只以列号作为参数.对于使用xticlabels(3)进行绘制，请在第三列标记标签.

Lets say I have a data file with three columns. I want to be able to change the x-axis labels. After a little googling I found xticlabels() but the problem is that it only seems to take a column number as the argument. For ex- plotting with xticlabels(3) marks the labels with the third column.

我希望能够将$1+$2之类的内容用作该函数的参数，即标签应为column1和column2的串联.

I want to be able to put something like $1+$2 as the argument for this function i.e. the label should be a concatenation of column1 and column2.

我该怎么做?

推荐答案

您使用awk ...

You use awk...

plot "<awk '{print $1,$2,$1 $2}' datafile" u 1:2:xticlabels(3) 

当然，这是一个愚蠢的示例，因为我们要串联2个(数字)字段来创建标签-令人怀疑的是您想要的是什么，但是它显示了如何在awk和真的就是您所需要的.

Of course, this is a silly example because we're concatenating 2 (numeric) fields to create the labels -- It's doubtful that is what you want, but it shows how to concatenate two fields (as strings) in awk and that's really all you need.

或者，您也可以哄骗gnuplot来执行此操作(未测试)，并具有以下某些变体:

Alternatively, you can probably coax gnuplot to do this (untested) with some variant of the following:

plot 'datafile' u 1:2:( xticlabels( stringcolumn(1).stringcolumn(2) ) )

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