R:如何用文本框注释ggplot? [英] R: How can I annotate a ggplot with a text box?

问题描述

我希望添加一个小的白色文本框，并在ggplot图的正文中添加自定义文本.我要添加的文本是识别要添加到绘图中的水平线.

I am looking to add a small white text box, with custom text in the body of my ggplot plot. The text I want to add is to identify a horizontal line I am adding to the plot.

  ggplot(cb_emp) +  
  geom_point(aes(x = grossunits, 
                 y = rate, 
                 color = as.factor(outlier))
                 , alpha = 1/4) +
  scale_color_discrete(name  ="Outcome",
                        breaks=c(0, 1),
                        labels=c("Not outlier", "Outlier")) +
  geom_hline(aes(yintercept = meancbrate)) + 
  geom_vline(aes(xintercept = meanac) +
  annotate("text", x = max(grossunits), y = meancbrate, label = "avg rate")  

这是我得到的情节:

这是我想要的情节(或类似的东西):

Here is the plot I want (or something like this):

请告诉我是否有实现此目标的简便方法.

Please let me know if there is an easy way of achieving this.

非常感谢您的帮助！

推荐答案

您可以简单地更改为

annotate("label", x = max(grossunits), y = meancbrate, label = "avg rate") 

，它将使用geom_label而不是geom_text，因此您将在标签周围得到一个矩形.

which will use geom_label rather than geom_text and so you get a rectangle around the label.

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