ggplot如何更改x轴标签而不改变基础数据

Question

我正在使用分面和离散数据绘图，如何在不更改基础数据的情况下更改x轴标签？即，标签应该显示为"Lab 1"，"Lab 2"，"Lab 3"，"Lab 4"，而不是"a"，"b"，"c"，"d"。

df <- data.frame(x = factor(rep(c("a","b","c","d"),4), levels = c("a","b","c","d")),
                 y = rep(seq(1,8,1),2),
                 z = c(rep("x",4),rep("y",4)),
                 facet = rep(c(rep("1",2),rep("2",2)),4))


ggplot(NULL) +
  geom_line(data=df, aes(y=y, x=x, linetype=z, group = z, colour=z)) +
  facet_grid(~facet, scales="free_x", space="free_x") +
  scale_colour_manual(values=c("Red","Blue")) +
  scale_linetype_manual(values=c("solid", "dashed"))

- user2568648

Answer 1

您可以在scale_x_discrete的labels参数中使用命名字符向量。

scale_x_discrete(labels = c("a" = "Lab 1", "b" =  "Lab 2", "c" = "Lab 3", "d" = "Lab 4") )

或者，您可以同时使用 breaks 和 labels

scale_x_discrete(breaks = c("a", "b", "c", "d"), 
                 labels = c("Lab 1", "Lab 2", "Lab 3", "Lab 4") )

- aosmith