ggplot 注释中的文本格式

Question

可以用html代码注释吗？我正在尝试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 package (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)

可以使用fill = NA 去除背景。去掉边框线label.color = NA可以用。

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)