DotDash 和 TwoDash l.netypes 在 ggplot2 R 中不起作用

Question

我正在尝试 plot twodash 和 dotdash，但我只得到破折号 output。

set.seed(111)
var <- rep(c("SP1","SP2","AB1","AB2"), times = 5)
var.val <- rnorm(20,5,1)
level <- rep(c(100,200,300,400), each = 5)

df <- data.frame(var, var.val, level)

ggplot(df, aes(x = level, y = var.val, col = var, group = var)) + 
  geom_point(aes(fill = var), colour="white",pch=21, size=4, stroke = 1,
             alpha = 0.7, data = df[df$var %in% c("SP1", "SP2"),]) +
  theme_classic() + 
  geom_smooth(data = df[df$var %in% c("SP1", "SP2"),],
              method = "lm", formula = y ~ x, alpha = 0.2) +
  geom_smooth(data = df[!df$var %in% c("SP1", "SP2"),],
              method = "lm", formula = y ~ x, se = FALSE, linetype = 2 ) +  
  scale_linetype_manual(values = c("dotdash", "twodash","solid", "solid")) + 
  scale_colour_manual(values = c("black","black","red","blue"))

Answer 1

尝试在ggplot调用中将l.netype设置为美学的一部分：

ggplot(df, aes(x = level, y = var.val, col = var, group = var, linetype = var)) + # set linetype
  geom_point(aes(fill = var), colour="white",pch=21, size=4, stroke = 1,
             alpha = 0.7, data = df[df$var %in% c("SP1", "SP2"),]) +
  theme_classic() + 
  geom_smooth(data = df[df$var %in% c("SP1", "SP2"),],
              method = "lm", formula = y ~ x, alpha = 0.2) +
  geom_smooth(data = df[!df$var %in% c("SP1", "SP2"),],
              method = "lm", formula = y ~ x, se = FALSE) +  
  scale_linetype_manual(values = c("dotdash", "twodash","solid", "solid")) + 
  scale_colour_manual(values = c("black","black","red","blue"))