[R] Polygon

Steven Yen @tyen @ending from ntu@edu@tw
Tue Oct 2 18:25:43 CEST 2018

Can someone help me with polygon. The following codes are self-runnable 
and mark a shaded area under the standard normal curve in the x-range 
Is there a way to also mark the area in (1,3), at the same time.
That is, I want shaded areas in both tails. Thank you...

# Create data for the area to shade
cord.x <- c(-3,seq(-3,-1,0.01),-1)
cord.y <- c(0,dnorm(seq(-3,-1,0.01)),0)

# Make a curve
curve(dnorm(x,0,1), xlim=c(-3,3), main='Standard Normal')

# Add the shaded area.

styen using ntu.edu.tw (S.T. Yen)

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