在ggplot的上边距添加垂直文本

Question

我有下面的情节代码

ggplot(na.omit(total), aes(x = day_after, y = use, group=t, na.rm=TRUE)) +
  geom_line(aes(linetype=t, color=t, na.rm=TRUE))+
  geom_point(aes(color=t, na.rm = TRUE)) +
  scale_color_manual(values=c("gray48", "indianred4"), labels=c("Treatment","Control")) +
  labs(x= "Days after beginning of deactivation period", y= "") +
  theme(panel.grid.minor = element_blank(),
        panel.background = element_blank()) +
  theme(panel.grid.major.x = element_blank(),
    panel.grid.major.y = element_line( size=.1, color="grey"))+
  theme(legend.key=element_blank()) +
  guides(linetype = FALSE) +
  annotate('segment',x = 0,xend = 0,y = 0,yend = 60,size = 3,colour = "grey",
           alpha = 0.4) +
  annotate('segment',x = 7,xend = 7,y = 0,yend = 60,size = 3,colour = "grey",
                                 alpha = 0.4) +
  annotate('segment',x = 39,xend = 39,y = 0,yend = 60,size = 3,colour = "grey",
           alpha = 0.4) 
new_plot <- plot + theme(legend.title=element_blank(), legend.text = element_text(size=10),
      legend.position = "right")

我想要做的是在绘图之外的多个给定 (x,y) 值的顶部添加垂直文本。 Annotate_custom 有效，但它没有旋转文本的选项。基本上我试过 + annotation_custom(text_end,xmin=42,xmax=42,ymin=62,ymax=62) 这将是惊人的，只有我不能有像角度 = 90 这样的选项。 有什么帮助吗？？

Answer 1

你可以使用annotation_custom，只要你关闭剪裁。您可以使用自定义grid::textGrob 来指定旋转。

我没有您的数据，但使用内置 mtcars 数据集的示例应该足以说明。

library(ggplot2)

ggplot(mtcars, aes(disp, mpg)) + 
  geom_point() +
  geom_vline(xintercept = c(200, 400), size = 10, alpha = 0.05) +
  coord_cartesian(clip = "off") +
  theme_bw() +
  theme(plot.margin = margin(80, 20, 20, 20),
        panel.border = element_blank()) +
  annotation_custom(grid::textGrob("label 1", rot = 90), 
                    xmin = 200, xmax = 200, ymin = 40) +
  annotation_custom(grid::textGrob("label 2", rot = 90), 
                    xmin = 400, xmax = 400, ymin = 40)