draw the following shaded area in R

Question

Possible Duplicate:
Shading a kernel density plot between two points.

How to draw this graph in R, assuming normal pdf?

enter image description here

score 6 · Answer 1 · edited May 23 '17 at 11:43

6

I answered that a while back on StackOverflow for something closely related. The question really is a duplicate and should be closed. All these how do I shade below a curve questions are answered by a close read of help(polygon) and a study of the existing examples.

edited May 23 '17 at 11:43

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answered Dec 30 '12 at 21:02

Dirk Eddelbuettel

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score 5 · Accepted Answer · answered Dec 30 '12 at 21:00

5

The code for getting shaded area below:

plot(dnorm,-4,4,xlab="x",ylab="pdf")
xvals <- seq(-2,1,length=50)
dvals <- dnorm(xvals)
polygon(c(xvals,rev(xvals)),c(rep(0,50),rev(dvals)),col="gray")

Result:

enter image description here

answered Dec 30 '12 at 21:00

m0nhawk

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+1 There seems to be a minor red/grey issue here – Henry Dec 31 '12 at 20:40

draw the following shaded area in R

2 Answers2