围绕轴标签绘制彩色框

考虑这个简单的例子

library(tidyverse)
tibble(x = as.factor(c('good', 'neutral', 'bad')),
       y = as.factor(c('bad', 'neutral', 'bad'))) %>% 
  ggplot(aes(x = x, y = y)) + geom_point()

我想贴上 x 标签（good, neutral, bad）在不同颜色的盒子里。例如，good（在 x 轴和 y 轴上）将被一个小绿色框包围，依此类推。

我可以这样做吗ggplot2?

像这样？

tibble(x = as.factor(c('good', 'neutral', 'bad')),
y = as.factor(c('bad', 'neutral', 'bad'))) %>%
ggplot(aes(x = x, y = y)) + 
  geom_point() + 
  theme(axis.text.x = element_text(color = c('red', 'blue', 'green')))

你的情节：

EDIT

另一种漂亮的 Ghetto 解决方案使用grid

tibble(x = as.factor(c('good', 'neutral', 'bad')),
y = as.factor(c('bad', 'neutral', 'bad'))) %>%
ggplot(aes(x = x, y = y)) + 
  geom_point()

grid::grid.polygon(x = c(.3,.3,.25,.25), y = c(.07,.04,.04,.07),gp = gpar(col = 'green', fill = 'green', alpha = .5))
grid::grid.polygon(x = c(.525,.525,.575,.575), y = c(.07,.04,.04,.07),gp = gpar(col = 'red', fill = 'red', alpha = .5))
grid::grid.polygon(x = c(.79,.79,.86,.86), y = c(.07,.04,.04,.07),gp = gpar(col = 'blue', fill = 'blue', alpha = .5))