r - ggplot 注释中的文本格式

Question

是否可以使用 html 代码进行注释？我试图只为几个单词而不是整个文本着色。

library(tidyverse)
#> Warning: package 'ggplot2' was built under R version 4.0.2

mtcars %>%
  ggplot(aes(x = hp, y = mpg)) +
  geom_point() +
  annotate(geom = "text", label = "I'm <span style='color: red;'>red</span> \n and i'm <span style='color: orange;'>orange</span>",
           x = 250, y = 25)

^{由reprex 包（v0.3.0）于 2020 年 8 月 22 日创建}

Answer 1

您可以使用包“ggtext”。这是相当新的。您的示例所需的唯一更改是替换 geom: 使用"richtext"而不是"text".

library(tidyverse)
library(ggtext)
#> Warning: package 'ggplot2' was built under R version 4.0.2

mtcars %>%
  ggplot(aes(x = hp, y = mpg)) +
  geom_point() +
  annotate(geom = "richtext", label = "I'm <span style='color: red;'>red</span> \n and i'm <span style='color: orange;'>orange</span>",
           x = 250, y = 25)

可以fill = NA用来去除背景。label.color = NA可以使用去除边界线。

library(tidyverse)
library(ggtext)

mtcars %>%
  ggplot(aes(x = hp, y = mpg)) +
  geom_point() +
  annotate(geom = "richtext", label = "I'm <span style='color: red;'>red</span>\n and i'm <span style='color: orange;'>orange</span>",
           x = 250, y = 25, fill = NA, label.color = NA)