用2个数组创建直方图图

Question

如何用R中的数据创建直方图？

f = c('0-5', '6-10', '11-15', '16-20', '> 20')
counts_arr = c(0, 8, 129, 127, 173)

现在，counts_arr[0]与f[0]相关联。

所以我试图让f在X轴上，counts_arr值在Y轴上

Answer 1

barplot(counts_arr, names = f)

Answer 2

已经有了解决这个问题的方法，但我已经用ggplot2准备了一些东西，尽管如此，我仍在发布。

library(ggplot2)
#> Warning: package 'ggplot2' was built under R version 3.4.3
library(forcats)
#> Warning: package 'forcats' was built under R version 3.4.3

# dataframe provided
df <-
  base::cbind.data.frame(
    f = c('0-5', '6-10', '11-15', '16-20', '> 20'),
    counts_arr = c(0, 8, 129, 127, 173)
  )

# plot
ggplot2::ggplot(data = df, mapping = aes(x = forcats::fct_inorder(f), y = counts_arr)) +
  geom_bar(stat = "identity") +
  labs(x = "f", y = "count")

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由reprex package创建于2018-02-10 (v0.1.1.9000)。