如何在ggboxplot中更改x轴标签

Question

我有一个包含多个因素的数据框。我使用ggboxplot获取具有不同类别比较的箱形图。我对x轴标签不满意。我尝试了不同的方法，但未能达到我的期望。 用于创建绘图的代码为：

    df <- data.frame(country=sample(LETTERS[1:4], 1000, TRUE),
    rating=round(rnorm(1000,70,15),1),
    sex =rep(c("Female","Male"),500),
    school=sample(c("public","private"),1000,TRUE))
    df$group <- paste(df$school,df$sex,sep=".")
    df <- df[order(df$group),]
    my_comparisons <- list(c("public.Female","public.Male") , c("private.Female","private.Male"))
    library(ggpubr)
    ggboxplot(df, x = "group",y = "rating",
          color = "group", palette = "simpsons",
          add = "jitter",facet.by="country",legend="none", ylab="Rating") +
      theme(strip.text.x=element_text(size=10, color="red", face="bold.italic"),
        axis.text.x = element_text(angle = 45, hjust = 1),
        axis.title.x = element_blank()) +
      stat_compare_means(method = "t.test",comparisons = my_comparisons,
                 label.y = 110,label = "p.signif")

预期图如下：  

Answer 1

这使您接近要查找的内容（我不知道行分隔符）。您可能还必须尝试调整标签的位置，以使它们和大小正确无误。

ggboxplot(df, x = "group",y = "rating",
          color = "group", palette = "simpsons",
          add = "jitter", facet.by="country", legend="none", ylab="Rating") +
scale_x_discrete(labels=rep(c("F","M"),4)) +
theme(strip.text.x=element_text(size=10, color="red", face="bold.italic"),
      axis.title.x = element_blank(),
      plot.margin=unit(c(2,2,15,2), "mm")) +
stat_compare_means(method = "t.test",comparisons = my_comparisons,
                   label.y = 110, label = "p.signif") +
coord_cartesian(ylim=c(20,120), xlim=c(1,4), clip="off") +
annotate("text", x=1.5, y=0, label=c("","","Private","Private")) +
annotate("text", x=3.5, y=0, label=c("","","Public","Public")) +
annotate("text", x=0.5, y=10, label=c("","","Sex",""), hjust=1) +
annotate("text", x=0.5, y=0, label=c("","","School",""), hjust=1)

添加的内容包括scale_x_discrete()用于更改x轴标签，plot.margin和coord_cartesian允许在绘图区域之外添加注释，annotate用于每个注释，其中的标签用于每个构面面板均以矢量形式给出，空白面板不应获得标签。

也许有一种更干净的方法可以执行此操作，但是绘图的多面性质意味着注释会在您不希望出现的情况下跨多个面复制。