小编bbp*_*lot的帖子

我是 R 的新手，并且设法在 ggplot 中制作了一个多线图。沿着 x 轴，我有 5 个时间点，它们是离散度量。我想要虚线的后半部分（见附图），有人可以帮我编辑我当前的代码来实现这一点吗？任何帮助将不胜感激。先感谢您！

ggplot(longdata, aes(x = Time, y = Strength, colour = Group)) +
  stat_summary(fun  = mean,
               geom = "point",)+ 
  stat_summary(fun = mean,
               geom = "line", 
               aes(group = Group), size =1,
               show.legend = FALSE) + 
               geom = "errorbar",
               width = .1, alpha = 0.3) +
  xlab("Testing Timepoint") +
  ylab("Isometric Strength (N.m)") +
  bbtheme +
  scale_colour_manual(name = "Group",
                      labels = c("Once-weekly", "Twice-weekly"),
                      values = c("red1", "navyblue")) +
  expand_limits(y = 0)