[R] how to plot shaded area under a curve?
Charles Annis, P.E.
Charles.Annis at StatisticalEngineering.com
Thu Sep 13 15:27:53 CEST 2007
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.
Charles.Annis at StatisticalEngineering.com
phone: 561-352-9699
eFax: 614-455-3265
http://www.StatisticalEngineering.com
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] 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]]
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