Shade are under a curve with polygon in RStudio

Asked Jun 04 '22 at 16:56

Active Jun 04 '22 at 17:24

Viewed 24 times

This is the plot x and y axis

xDM<- seq(0, 2*mean1, 0.1)

yDMedia<- dnorm(xDM, mean1, standarD/sqrt(n))

This is my attempt to shade the area from 6 to 0 under the plot curve

 polygon(c(xDM[xDM<=6], max(xDM), 6), c(yDM[xDM<=6], 0, 0), col="red")

The result

The blue dashed line is where I want the polygon to finish, I can't see where I'm doing bad the axis of the shade in the polygon function

edited Jun 04 '22 at 17:24

Quinten

asked Jun 04 '22 at 16:56

zpip101

You are close, try `polygon(c(xDM[xDM<=6], 6, max(xDM)), c(yDM[xDM<=6], 0, 0), col="red")` – Andrew Brown Jun 04 '22 at 17:14
You might also find this post helpful: https://stackoverflow.com/questions/3494593/shading-a-kernel-density-plot-between-two-points. – Andrew Brown Jun 04 '22 at 17:25

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