我目前正在尝试使用ggplot函数从两个虚线中选出两个。该图是显示属于两个不同因子组的两条回归线的图。我已经能够使其中一条虚线变为虚线，但是我很难使另一条虚线带有虚线。任何帮助将不胜感激。
coli_means %>%
ggplot(aes(time,mean_heartrate,group = treatment)) +
geom_point( aes(group = treatment,color = treatment)) +
geom_smooth(aes(method = "loess",linetype = treatment,se = FALSE,group = treatment,color = treatment,show.legend = TRUE))
我觉得我缺少一种简单的输入。谢谢。
您需要做的是使用scale_linetype_manual()，然后告诉他们两个治疗组都需要一个虚线。
让我们从一个可重复的示例开始：
# reproducible example:
set.seed(0)
time <- rep(1:100,2)
treatment <- c(rep("A",100),rep("B",100))
mean_heartrate <- c(rnorm(100,60,2),rnorm(100,80,2))
coli_means <- data.frame(time,treatment,mean_heartrate)
# ggplot
coli_means %>%
ggplot(aes(x = time,y = mean_heartrate)) +
geom_point(aes(color = treatment)) +
geom_smooth(aes(linetype = treatment,color = treatment))+
scale_linetype_manual(values = c('dashed','dashed'))
