Great. Thanks! It did wonders. 1. Is there a way to suppress the obvious tick stops (-3,-2,-1,0,1,2,3) and mark only the ticks -1.96 and 1.96. 2. Better yet, to draw vertical lines at x = -1.96 and x = 1.96. Thanks. Steven
On 10/3/2018 12:51 AM, Rui Barradas wrote: > Hello, > > Continue with > > > polygon(-rev(cord.x), rev(cord.y), col = 'skyblue') > > > Hope this helps, > > Rui Barradas > > Às 17:25 de 02/10/2018, Steven Yen escreveu: >> 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 >> (-3,-1). >> 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. >> polygon(cord.x,cord.y,col='skyblue') >> > -- st...@ntu.edu.tw (S.T. Yen) [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.