While it's true that polygon() is the function you need, perhaps it would be helpful to see an example of how to use polygon().
Go here: http://addictedtor.free.fr/graphiques/thumbs.php Put the mouse over the thumbnail plots to see larger pictures and look for something useful. You will find it here: http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=88 The code for this graph is downloadable too. Just click on the icon on the left of the screen. Best wishes! Charles Annis, P.E. [EMAIL PROTECTED] phone: 561-352-9699 eFax: 614-455-3265 http://www.StatisticalEngineering.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of gallon li Sent: Thursday, September 13, 2007 6:52 AM To: r-help Subject: [R] how to plot shaded area under a curve? say, I am plotting x=seq(0,5,len=100) y=-(x-5)^2 plot(x,y) how can I put some color or verticle lines below the plotted curve? [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list 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. ______________________________________________ R-help@r-project.org mailing list 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.
