R作图：插入颜色

mathfan 发表于 2013-1-15 05:09
x=1:10
y=x
plot(x,y,col=1:length(x),pch=16)

你好，请问下用R如何实现强调一个区间呢，类似这个图的阴影部分

Here is an examle:

bg.col=par(bg = 'light green')
y=rnorm(100)
x=1:length(y)
x1=60
x2=80
plot(x,y, type = "n")
lim = par("usr")
rect(x1, lim[3], x2, lim[4], border = "gray", col = "gray")
lines(x,y)
par(bg.col)