R 限制geom_线的x轴范围（由斜率和截距定义） 库（ggplot2） ## df

我认为这是一种获得你想要的东西的方法：

library(ggplot2)
##
df <- as.data.frame(matrix(rnorm(60*2, mean=3,sd=1), 60, 2))
    colnames(df) <- c("A", "B")
    cf1 <- coef(lm(B~A, data=df))
##    
ggplot(df, aes(A,B)) +
  geom_point() +
  stat_smooth(method = "lm", color="red", fill="red", alpha=0.1, fullrange=TRUE) +
  #xlim(0,6)+
  geom_abline(intercept = cf1[1], slope = cf1[2], lty="dashed", col="green") 

---

min\x缩放怎么样<代码>+coord_笛卡尔（xlim=c（1，5））

？是的，这是一个很好的启发

min_x <- min(df$A)
min_y <- unname(cf1[1])
max_x <- max(df$A)
max_y <- min_y + unname(cf1[2]) * max_x
##
p <- ggplot(df, aes(A,B)) +
  geom_point() +
  stat_smooth(
    method = "lm", color = "red", 
    fill = "red", alpha = 0.1, 
    fullrange = TRUE)
##
R> p + geom_segment(
    aes(x = min_x, y = min_y,
        xend = max_x, yend = max_y),
    linetype = "dashed",
    color = "green")