如何在R中使用ggplot对双杠进行排序？

由噢特慢~发布于 2020-05-09 06:32:37

我正在学习r，我在按升序或降序对双杠进行排序时遇到问题，我想在图的顶部设置图例，用两种颜色分别表示一行和两列，例如：

The title Time

box color Breakfast box color Dinner

还有这里的情节

这是我的数据框：

dat <- data.frame(
  time = factor(c("Breakfast","Breakfast","Breakfast","Breakfast","Breakfast","Lunch","Lunch","Lunch","Lunch","Lunch","Lunch","Dinner","Dinner","Dinner","Dinner","Dinner","Dinner","Dinner"), levels=c("Breakfast","Lunch","Dinner")),
  class = c("a","a","b","b","c","a","b","b","c","c","c","a","a","b","b","b","c","c"))

这是我进行更改的代码：

dat %>% 
  filter(time %in% c("Breakfast", "Dinner")) %>%
  droplevels %>%
  count(time, class) %>% 
  group_by(time) %>% 
  mutate(prop = n/sum(n)) %>%
  ggplot(aes(x = class, y = prop, fill = time, label = scales::percent(prop))) +
  geom_col(position = 'dodge') +
  geom_text(position = position_dodge(width = 0.9), vjust = 0.5, size = 3) + 
  scale_y_continuous(labels = scales::percent)+
  coord_flip()

任何帮助，将不胜感激。

zomnis

2020-05-09 06:32:37

这样的事情应该接近您的要求，随时问更多

Resources consulted during the answer: http://www.sthda.com/english/wiki/ggplot2-legend-easy-steps-to-change-the-position-and-the-appearance-of-a-graph-legend-in-r-software

library(tidyverse)

dat <- data.frame(
  time = factor(c("Breakfast","Breakfast","Breakfast","Breakfast","Breakfast","Lunch","Lunch","Lunch","Lunch","Lunch","Lunch","Dinner","Dinner","Dinner","Dinner","Dinner","Dinner","Dinner"), levels=c("Breakfast","Lunch","Dinner")),
  class = c("a","a","b","b","c","a","b","b","c","c","c","a","a","b","b","b","c","c"))


dat %>% 
  filter(time %in% c("Breakfast", "Dinner")) %>%
  droplevels %>%
  count(time, class) %>% 
  group_by(time) %>% 
  mutate(prop = n/sum(n)) %>%
  ggplot(aes(x = fct_reorder(class,prop), y = prop, fill = time, label = scales::percent(prop))) +
  geom_col(position = 'dodge') +
  geom_text(position = position_dodge(width = 0.9), vjust = 0.5, size = 3) + 
  scale_y_continuous(labels = scales::percent)+
  coord_flip() +
  labs(x = "class",fill = "Time") +
  theme(legend.position = "top")

^{Created on 2020-05-08 by the reprex package (v0.3.0)}

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闾丘山雁

2020-05-09 06:32:37

要使图例标题位于图例键上方，需要对主题和指南进行一些其他调整。

dat %>% 
  filter(time %in% c("Breakfast", "Dinner")) %>%
  droplevels %>%
  count(time, class) %>% 
  group_by(time) %>% 
  mutate(prop = n/sum(n)) %>%
  ggplot(aes(x = class, y = prop, fill = time, label = scales::percent(prop))) +
  geom_col(position = 'dodge') +
  geom_text(position = position_dodge(width = 0.9), vjust = 0.5, size = 3) + 
  scale_y_continuous(labels = scales::percent)+
  coord_flip() +
  theme(legend.position="top", legend.direction="vertical", legend.title=element_text(hjust = 0.5))+
  guides(fill = guide_legend(title = "Time", nrow = 1))

噢特慢~

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