ggplot facet_grid x轴步进

Question

使用facet_grid对齐分类x轴标签时出现问题 它不对齐，我无法弄清楚如何使其对齐。

我的代码：

ggplot(data=dataset, aes(x=Question)) + 
facet_grid(~Indicator,scales = "free_x")+
scale_x_discrete(labels = function(x) lapply(strwrap(x, width = 45, simplify = FALSE),paste, collapse="\n"))+
coord_cartesian(ylim = c(20, 90))+
  geom_line(aes(y = Result))+ geom_point(aes(y = Result))+
  geom_line(aes(y = Result_2))+ geom_point(aes(y = Result_2))+
  theme_minimal()+
  theme(
    axis.title.x=element_blank(),
    axis.text.x=element_text(angle = 90, hjust = 0, vjust = 0.5))

数据：

structure(list(Question = structure(c(1L, 2L, 3L, 4L, 5L, 6L, 
7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 
20L, 21L, 22L, 23L, 24L, 25L, 26L, 32L, 33L, 34L, 35L, 36L, 37L, 
38L, 39L, 27L, 28L, 29L, 30L, 31L, 40L, 44L, 45L, 46L, 47L, 48L, 
49L, 50L, 51L, 41L, 42L, 43L), .Label = c("A.1 long label", "A.2 long label", 
"A.3 long label", "A.4 long label", "A.5 long label", "A.6 long label", 
"A.7 long label", "A.8 long label", "B.1 very long label", "B.2 very long label", 
"B.3 very long label", "B.4 very long label", "B.5 very long label", 
"B.6 very long label", "B.7 very long label", "B.8 very long label", 
"C.1 very long label", "C.2 very long label", "C.3 very long label", 
"C.4 very long label", "C.5 very long label", "C.6 very long label", 
"C.7 very long label", "C.8 very long label", "C.9 very long label", 
"D.1 very very long label", "D.10 very very long label", "D.11 very very long label", 
"D.12 very very long label", "D.13 very very long label", "D.14 very very long label", 
"D.2 very very long label", "D.3 very very long label", "D.4 very very long label", 
"D.5 very very long label", "D.6 very very long label", "D.7 very very long label", 
"D.8 very very long label", "D.9 very very long label", "E.1 very very long label", 
"E.10 very very long label", "E.11 very very long label", "E.12 very very long label", 
"E.2 very very long label", "E.3 very very long label", "E.4 very very long label", 
"E.5 very very long label", "E.6 very very long label", "E.7 very very long label", 
"E.8 very very long label", "E.9 very very long label"), class = "factor"), 
    Indicator = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L, 1L, 2L, 
    2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 3L, 
    3L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 4L, 
    5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L, 5L), .Label = c("A", 
    "B", "C", "D", "E"), class = "factor"), Index = c(47L, 44L, 
    48L, 46L, 50L, 45L, 49L, 51L, 37L, 36L, 38L, 39L, 40L, 41L, 
    43L, 42L, 30L, 28L, 32L, 27L, 29L, 31L, 33L, 34L, 35L, 14L, 
    15L, 16L, 17L, 18L, 19L, 20L, 21L, 23L, 13L, 22L, 25L, 26L, 
    24L, 4L, 5L, 2L, 3L, 1L, 7L, 9L, 8L, 10L, 12L, 6L, 11L), 
    Result = c(67.1, 62.9, 50.7, 59, 56.4, 50.4, 41.6, 65.9, 
    82.4, 84.8, 83.2, 87.1, 85.6, 79.3, 86.8, 78.9, 62, 73.7, 
    70.3, 81, 77, 55.1, 64.2, 62.2, 64.1, 62.7, 64.8, 62.3, 60.5, 
    49.4, 50.6, 72.6, 43.7, 49.3, 73.4, 56, 54.4, 56.1, 58.4, 
    72.1, 66.7, 78.2, 79.6, 80.7, 65.6, 59.5, 66.4, 53.5, 68, 
    76.3, 70.8), Result_2 = c(54.8, 61.4, 52.1, 58.5, 63.8, 47.4, 
    50.4, 69.8, 77.7, 79.3, 78.8, 82.1, 80.3, 72.6, 84.1, 74.2, 
    59.8, 68.6, 65.3, 75.8, 71.1, 49.1, 61.5, 53.3, 55.4, 54.4, 
    57.2, 57.5, 53.7, 41.2, 40.2, 65, 31.2, 37.3, 62.2, 47.3, 
    45.2, 47.2, 42.8, 65.5, 58.7, 70.6, 72.5, 73.9, 57.5, 52.6, 
    60.7, 44.3, 63.6, 69.7, 63.5)), class = "data.frame", row.names = c(NA, 
-51L))

无论我似乎如何格式化标签，标签似乎都被踩了

Answer 1

根据请求-使用my other answer的中等技巧

我还对您的情节代码进行了轻微更改。我建议您看一下并了解其优点-最重要的是将数据转换为长格式。其他基于方便的更改是在ggplot主调用中定义美学。

geom_text调用的数据帧需要相同的值/变量来进行分面！

我也可以提出一个建议-如果您每个类别的每个x都具有相同的长标签-为什么不将这个标签带入小平面条，然后每个x只能将索引作为标签。长的x标签并没有真正帮助可视化。如果翻转图形，长标签通常更容易阅读，因此它们将是水平的，但在大多数情况下，实际上并不需要长x标签。

library(tidyverse)

ann_x <- data.frame(Question = unique(dataset$Question), Indicator = str_sub(unique(dataset$Question), 1, 1))

dataset_l <- dataset %>% pivot_longer(names_to = "key", values_to = "value", cols = contains("result"))

ggplot(data = dataset_l, aes(x = Question, y = value)) +
  geom_line(aes(group = key)) +
  geom_point() +
  geom_text(data = ann_x, aes(y = -35, label = Question), angle = 90, hjust = 0, size = 5 / 14 * 10) +
  facet_grid(~Indicator, scales = "free_x") +
  coord_cartesian(ylim = c(20, 90), clip = "off") +
  theme(
    axis.title.x = element_blank(),
    axis.text.x = element_blank(),
    plot.margin = margin(0.1, 0.1, 2, 0.1, "in")
  )

^{由reprex package（v0.3.0）于2020-03-15创建}