如何使用 ggtext 为 r 中的轴数据标签着色？

Question

我遇到了从 https://wilkelab.org/ggtext/ 到使用 element_markdown() 为轴数据标签着色的 ggtext 包，并尝试为我的轴标签着色但失败了。

代码（没有ggtext）:

library(tidyverse)

read.csv("https://raw.githubusercontent.com/johnsnow09/covid19-df_stack-code/main/df_stack_limited.csv") %>% 
  
  ggplot(aes(x = Cases_type, y = Country.Region)) +
  geom_point(shape = 21, aes(size = Cases_size, color = Cases_type), fill="#f8f2e4", stroke=3) +
  # theme_minimal() +
  theme_wsj() +
  theme(axis.text.x = element_text(angle = 90),
        axis.text = element_text(size = 8),
        legend.position = "none",
        plot.title = element_text(face = "bold", family = "serif", size = 20),
        plot.subtitle = element_text(face = "plain", family = "serif", size = 12),
        plot.caption = element_text(face = "plain", family = "serif", size = 9)) +

  scale_color_tableau(palette = "Tableau 10") +
  # scale_color_wsj(palette = "colors6") +
  
  facet_wrap(~Date) +
  labs(title = "Top 5 Countries for all type of Daily cases",
       subtitle = "For Latest 7 days separated by each date",
       caption = "created by ViSa (SciArt!!)") +
  coord_cartesian(clip = "off")

现在，如果我添加 ggtext 为 x-axis 数据标签着色，那么我会收到错误消息

library(tidyverse)
library(ggtext)

color = c("#2596be", "#f28e2b", "#e15759")

read.csv("https://raw.githubusercontent.com/johnsnow09/covid19-df_stack-code/main/df_stack_limited.csv") %>% 
  
  mutate(Cases_type = glue("<i style='color:{color}>{Cases_type}</i>'")) %>% 
  
  ggplot(aes(x = Cases_type, y = Country.Region)) +
  geom_point(shape = 21, aes(size = Cases_size, color = Cases_type), fill="#f8f2e4", stroke=3) +
  # theme_minimal() +
  theme_wsj() +
  theme(axis.text.x = element_text(angle = 90),
        axis.text = element_text(size = 8),
        legend.position = "none",
        plot.title = element_text(face = "bold", family = "serif", size = 20),
        plot.subtitle = element_text(face = "plain", family = "serif", size = 12),
        plot.caption = element_text(face = "plain", family = "serif", size = 9)) +
  
  theme(axis.text.x = element_markdown()) +
  scale_color_tableau(palette = "Tableau 10") +
  # scale_color_wsj(palette = "colors6") +
  
  facet_wrap(~Date) +
  labs(title = "Top 5 Countries for all type of Daily cases",
       subtitle = "For Latest 7 days separated by each date",
       caption = "created by ViSa (SciArt!!)") +
  coord_cartesian(clip = "off")

Answer 1

我认为你需要改变

"<i style='color:{color}>{Cases_type}</i>'"

至

"<i style='color:{color}'>{Cases_type}</i>"

Answer 2

问题是您尝试 glue 长度为 3 的 color 向量与长度为 105 的向量的 Cases_type 列。而是 color命名向量并使用 color[Cases_type] 确保您分配正确的颜色。此外，您的 glue 语句中缺少引号。

library(tidyverse)
library(ggtext)
library(glue)
library(ggthemes)

color = c(Daily_cases = "#2596be", Daily_deaths = "#f28e2b", Daily_recovered = "#e15759")

d <- read.csv("https://raw.githubusercontent.com/johnsnow09/covid19-df_stack-code/main/df_stack_limited.csv") %>% 
  mutate(Cases_type = glue("<i style='color: {color[Cases_type]}'>{Cases_type}</i>'")) 

d %>% 
  ggplot(aes(x = Cases_type, y = Country.Region)) +
  geom_point(shape = 21, aes(size = Cases_size, color = Cases_type), fill="#f8f2e4", stroke=3) +
  #theme_minimal() +
  theme_wsj() +
  theme(axis.text.x = element_text(angle = 90),
        axis.text = element_text(size = 8),
        legend.position = "none",
        plot.title = element_text(face = "bold", family = "serif", size = 20),
        plot.subtitle = element_text(face = "plain", family = "serif", size = 12),
        plot.caption = element_text(face = "plain", family = "serif", size = 9)) +
  theme(axis.text.x = element_markdown()) +
  scale_color_tableau(palette = "Tableau 10") +
  # scale_color_wsj(palette = "colors6") +
  facet_wrap(~Date) +
  labs(title = "Top 5 Countries for all type of Daily cases",
       subtitle = "For Latest 7 days separated by each date",
       caption = "created by ViSa (SciArt!!)") +
  coord_cartesian(clip = "off")

如何使用 ggtext 为 r 中的轴数据标签着色？

how to use ggtext to color axis data labels in r?

r

ggplot2

ggtext