“平方" R中ggplot2 yaxis标签中的上标

问题描述

我正在用ggplot2绘制多线图，并且在用英里每秒平方标记y轴时遇到麻烦.我已经尝试过以下命令:

I am plotting a multiple line graph with ggplot2 and am having trouble labeling the y-axis with mile per second squared. I have tried the command:

ggplot(data.frame, aes(id)) + labs(y = "Acceleration in m/s^2")

and(搜索堆栈溢出后):

and( after searching Stack Overflow):

ggplot(data.frame, aes(id)) + labs(y = expression ("Acceleration in m/s[2]")

在两种情况下，标签都不会创建上标，而是看起来完全像"Acceleration m/s ^ 2".应该如何构造用于ggplot标签的上标命令?

In both cases, the label does not create superscript, instead looking exactly like "Acceleration m/s^2". How should this superscript command for a ggplot label be constructed?

推荐答案

尝试以下方法:

 + labs(y = expression ("Acceleration in"~m/s^2))

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