Question

如何使用 stat_smooth（method ='lm'）使标签（道路）的每一行回归？我无法用此代码获得任何行。.

library(ggplot2)
p1<-ggplot(data=a, aes(x = date_cut, y = price_mul, color=road)) +
  geom_point(size=1.5) + stat_smooth(method = 'lm') +
  scale_x_discrete(limits = c("06", "07", "08", "09", "10", "11", "12", "01", "02", "03", "04", "05")) +
  ylim(0, max(a$price_mul)) + labs(x = "month (2018.06 ~ 2019.05)", y = "price", size = 10) + 
  theme_calc() +
  scale_color_discrete(name="road") +
  theme(plot.title = element_text(face = "bold", hjust = 0.5, size = 16, color = "black"))

image

Answer 1

您是否尝试过使用geom_smooth(method = "lm")。这是使用虹膜数据集的示例：

iris%>%
  ggplot(aes(x = Petal.Length, y = Petal.Width, color = Species))+
  geom_point()+geom_smooth(method = "lm")

如何绘制多元回归线？

1 个答案: