手动标注一个面板瓦特/多个标签 [英] Manually annotate one panel w/ multiple labels

问题描述

这是非常相似，这个问题（<一个href=\"http://stackoverflow.com/questions/2417623/manual-annotate-a-ggplot-with-different-labels-in-different-facets\">link),但我不太清楚如何来操纵它满足我的需求。

This is very similar to this question (link), but I'm not quite sure how to manipulate it for my needs.

我有两个面板刻面的情节，我便想在第一小组三个象限只有一个面板。

I have a faceted plot with two panels, and I would like to label three quadrants in the first panel and only the first panel.

下面是一个模拟数据集：

Here is a mock data set:

dfr=data.frame(
 variable=rep(c("A","B"),each=2),
 x=c(2,-3,4,-5),
 y=c(-2,4,-2,6))

而这里是小区：

p=ggplot(dfr,aes(x,y))+
 geom_point()+
 facet_grid(variable~.)+
 scale_x_continuous(limits=c(-6,6))+
 scale_y_continuous(limits=c(-6,6))+
 geom_hline(yintercept=0)+
 geom_vline(xintercept=0)

这是我想完成什么：

推荐答案

您可以随时创建所需的标签，一个单独的数据帧，并使用绘制它们 geom_text ：

You can always create a separate data frame with the desired labels and plot them using geom_text:

dfLab <- data.frame(variable = rep("A",3),
                    x = c(3,3,-3),
                    y = c(3,-3,-3),
                    lab = c('I','IV','III'))


ggplot(dfr,aes(x,y))+
 geom_point()+
 facet_grid(variable~.)+
 scale_x_continuous(limits=c(-6,6))+
 scale_y_continuous(limits=c(-6,6))+
 geom_hline(yintercept=0)+
 geom_vline(xintercept=0) + 
 geom_text(data = dfLab,aes(x=x,y=y,label=lab))

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