ggplot2中绘制渐变色的散点图

 

001、

library(ggplot2)

data <- data.frame(
  x = rnorm(100), 
  y = rnorm(100)
)

ggplot(data, aes(x = x, y = y, color = y)) +
  geom_point(size = 3) +
  scale_color_gradient(low = "blue", high = "red") 

 。