在一个情节中着色不同的点

Question

我有

x1 <- runif(100,36.6,37.5)
x2 <- runif(100,37.5,38.5)
x3 <- runif(100,38.5,40)
all <- c(x1,x2,x3)
plot(all,col=c("red","yellow","blue"))

如何用红色绘制x1，用黄色绘制x2，用蓝色绘制x3？

Answer 1

col参数与数据向量并行解释，因此您需要将每个值重复100次：

set.seed(101)    
x1 <- runif(100,36.6,37.5)
x2 <- runif(100,37.5,38.5)
x3 <- runif(100,38.5,40)
all <- c(x1,x2,x3)
plot(all,col=rep(c("red","yellow","blue"),each=100))