曲线R下的阴影面积 [英] shaded area under curve R

问题描述

我试图在曲线下绘制阴影区域，但阴影区域在曲线上方.谁能告诉我我的代码有什么问题?

I am trying to plot a shaded area under a curve but however the shaded area is over the curve. Can anyone tell me what's wrong with my code?

x=seq(0,30)
y1=exp(-0.1*x)
plot(x,y1,type="l",lwd=2,col="chocolate1")
polygon(x,y1, density = 5, angle = 45,col="chocolate1")

推荐答案

你可能想要这样的:

polygon(c(min(x),x),c(min(y1),y1), density = 5, angle = 45,col="chocolate1")

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