r - 如何在 R 中绘制因子变量

Question

我的数据框是这样的:

ind.heights <- structure(list(names = structure(c(3L, 4L, 5L, 1L, 2L), .Label = c("bagmati", 
"bardiya", "Jumla", "kalikot", "ramechap"), class = "factor"), 
    heights = c(5.6, 4.5, 6.1, 5.5, 5.1), placesSD = c(2, 2, 
    2, 2, 2), lower_boundary = c(3.84695491884684, 2.74695491884684, 
    4.34695491884684, 3.74695491884684, 3.34695491884684), upper_boundary = c(7.35304508115316, 
    6.25304508115316, 7.85304508115316, 7.25304508115316, 6.85304508115316
    )), row.names = c(NA, -5L), class = "data.frame")

我尝试绘制该数据的散点图，如下所示:

plot(
  # x= names, y = heights,
  heights ~ names,
  data = ind.heights,
  col = "blue",
  pch = 19,
  main = "Heights",
  ylab = "Heights",
  ylim = c(
    min(ind.heights$lower_boundary),
    max(ind.heights$upper_boundary)
  )
)

这里的问题是我的变量是一个因素，无法正确绘制，但如果我用数值更改变量并运行相同的代码，我会得到所需的绘图。

ind.heights$names <- 1:5
plot(
      # x= names, y = heights,
      heights ~ names,
      data = ind.heights,
      col = "blue",
      pch = 19,
      main = "Heights",
      ylab = "Heights",
      ylim = c(
        min(ind.heights$lower_boundary),
        max(ind.heights$upper_boundary)
      )
    )

如何使用具有原始名称的因子绘制此图？

Answer 1

不知道如何使用基本 R，但可以使用 ggplot 来完成:

ggplot(ind.heights, aes(x = names, y = heights)) +
  geom_point(size = 4) +
  geom_errorbar(aes(ymax = upper_boundary, ymin = lower_boundary))