一个图中 4 个组的多个箱线图

Question

我想为一个数据集绘制箱线图，该数据集包括四个分类，例如：好、坏、非常好和非常坏以及四个正态分布。 我的问题是如何在一个图中绘制四个不同正态分布的四个分类图，我已经尝试过（见下文），但看起来一团糟。 我使用了一个我在这里找到的示例，并对其进行了一些更改。 我添加了另一个经过编辑的图，我希望每个箱形图看起来像这样，更清晰，每四个分类（蓝色、黄色、红色和绿色）都清晰。

par(mfrow=c(2,2))
df <- data.frame(id = c(rep("Good",200), rep("Bad", 200),
                        rep("VeryGood",200), rep("VeryBad",200)),
           F1 = c(rnorm(200,10,2), rnorm(200,8,1), rnorm(200,5,2),rnorm(200,7,3)),
           F2 = c(rnorm(200,7,1),  rnorm(200,6,1), rnorm(200,8,1),rnorm(200,12,4)),
           F3 = c(rnorm(200,6,2),  rnorm(200,9,3),rnorm(200,12,3),rnorm(200,15,2)),
           F4 = c(rnorm(200,12,3), rnorm(200,8,2),rnorm(200,8,5),rnorm(200,5,1)))

boxplot(df[,-1], xlim = c(0.5, ncol(df[,-1])+0.9), 
        boxfill=rgb(1, 1, 1, alpha=1), border=rgb(1, 1, 1, alpha=1)) #invisible boxes
boxplot(df[which(df$id=="Good"), -1], xaxt = "n", add = TRUE, boxfill="red", boxwex=0.25, 
        at = 1:ncol(df[,-1]) - 0.15) #shift these left by -0.15
boxplot(df[which(df$id=="Bad"), -1], xaxt = "n", add = TRUE, boxfill="blue", boxwex=0.25,
        at = 1:ncol(df[,-1]) + 0.15) #shift these right by +0.15
boxplot(df[which(df$id=="VeryBad"), -1], xaxt = "n", add = TRUE, boxfill="green", boxwex=0.25,
        at = 1:ncol(df[,-1]) + 0.25) #shift these right by +0.15
boxplot(df[which(df$id=="VeryGood"), -1], xaxt = "n", add = TRUE, boxfill="yellow", boxwex=0.25,
        at = 1:ncol(df[,-1]) + 0.45) #shift these right by +0.15

Answer 1

如果您没有设置使用 Base R 图形，并查看您添加到问题中的新图，我相信这就是您要寻找的：

library(dplyr)
library(tidyr)
library(ggplot2)

df <- data.frame(id = c(rep("Good",200), rep("Bad", 200),
                        rep("VeryGood",200), rep("VeryBad",200)),
                 F1 = c(rnorm(200,10,2), rnorm(200,8,1), rnorm(200,5,2),rnorm(200,7,3)),
                 F2 = c(rnorm(200,7,1),  rnorm(200,6,1), rnorm(200,8,1),rnorm(200,12,4)),
                 F3 = c(rnorm(200,6,2),  rnorm(200,9,3),rnorm(200,12,3),rnorm(200,15,2)),
                 F4 = c(rnorm(200,12,3), rnorm(200,8,2),rnorm(200,8,5),rnorm(200,5,1)))

df2 <- tidyr::gather(df, key = "FVar", value = "value", F1:F4)

df2 %>% 
  ggplot(aes(id, value, fill = id)) + 
  geom_boxplot() + 
  facet_grid(. ~ FVar) + 
  theme(axis.text.x = element_text(angle = 90, hjust = 0.5, vjust = 0.5))