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lines函数
在已有图上加线,功能相当于plot(x,y,type=‘l’)
x <- 1:20
y1 <- sample(1:100, 20)
y2 <- sample(1:100, 20)
plot(x, y1, type = 'l')
lines(x, y2, col = 'red', type = "p")
对应结果:
x <- 1:20
y1 <- sample(1:100, 20)
y2 <- sample(1:100, 20)
plot(x, y1, type = 'l')
lines(x, y2, col = 'red',)
对应结果: