有没有办法用三行在另一行上注释 ggplot，同时保持三行的文本大小相同？
我快到了，但第三行的文本大小不同，看起来 bgroup 只使用前两行，我无法做到这一点......
我正在将文本添加到“？plotmath”中的“顶部”应用程序中，效果很好，但与其他两行相比，第三行中的文本大小不同......
library(ggplot2)
line1 = "xxx data1"
line2 = "yyy data2"
line3 = "zzz data3"
df=data.frame(x=rep(1:8, 3), y=c(0,1,3,4,5,6,7,8, 8,7,6,3,2,1,3,4, 0,2,4,5,6,7,8,9), variable=c("x", "x","x","x","x","x","x","x","y","y","y","y","y","y","y","y","z","z","z","z","z","z","z","z"))
p <- ggplot(df) + theme_bw() + geom_point(aes(x=x,y=y, color=variable)) + geom_line(aes(x=x,y=y, color=variable)) +
geom_text(x=max(df$x), y = max(df$y), label = paste('bgroup("{", atop(atop("',line1,'","',line2,'"),"', line3,'"), "}")',sep=''), size=3.5,parse=TRUE)
我以为我得到了 bgroup 中的所有三行，但我无法正确粘贴。如果有什么我可以尝试的，请指教。非常感谢！