R语言单列饼图

Question

如何用R语言创建单列的饼图？ 尝试在 google 上搜索它，但我找不到与单个列相关的任何内容。

Answer 1

假设您的数据框如下所示：

df <- data.frame(single_column = c(21, 48, 15, 16))

df
#>   single_column
#> 1            21
#> 2            48
#> 3            15
#> 4            16

然后你可以这样做：

library(ggplot2)

ggplot(df, aes(x = 1, y = single_column, fill = factor(single_column))) + 
  geom_col() +
  geom_text(position = position_stack(vjust = 0.5), 
            aes(label = single_column)) +
  coord_polar(theta = "y") +
  theme_void() +
  theme(legend.position = "none")

Answer 2

这来自 Quick-R 的网站：

# Pie Chart with Percentages
slices <- c(10, 12, 4, 16, 8)
lbls <- c("US", "UK", "Australia", "Germany", "France")
pct <- round(slices/sum(slices)*100)
lbls <- paste(lbls, pct) # add percents to labels
lbls <- paste(lbls,"%",sep="") # ad % to labels
pie(slices,labels = lbls, col=rainbow(length(lbls)),
   main="Pie Chart of Countries")

希望它适合您的需求。