在没有 y 定义变量的情况下订购 geom_bar()

Question

当 y 只是 x 的计数时，有没有办法对 geom_bar() 中的条进行排序？

示例：

ggplot(dat) +
  geom_bar(aes(x = feature_1))

我尝试使用 reorder()，但它需要在 aes().

中定义一个 y 变量

Answer 1

编造数据：

dfexmpl <- data.frame(stringsAsFactors = FALSE,
         group = c("a","a","a","a","a","a",
                   "a","a","a","b","b","b","b","b","b","b","b","b",
                   "b","b","b","b","b","b"))

plot code - reorder 正在做按计数排列的工作：

dfexmpl %>%
group_by(group) %>%
mutate(count = n()) %>%
ggplot(aes(x = reorder(group, -count), y = count)) +
geom_bar(stat = "identity")

结果：

在没有 y 定义变量的情况下订购 geom_bar()

Ordering geom_bar() without a y defined variable

r

ggplot2

geom-bar