R help - Feb 2011 - Plot of set

I am in the situation where I have to make a two-dimential plot of a set. If I
simplify my data it would be something along the lines of wanting to plot {x,y|
x^2+y^2 < = 1}.
I am aware of the contour and persp plot, but cannot figure out how to convert
one of those to draw the set. I have tried to google different ways of plotting
in R but have not been able to find a method through that either.
 
Thanks in advance
 
Lise  		 	   		  
	[[alternative HTML version deleted]]

On Feb 20, 2011, at 4:41 AM, . . wrote:
>
> I am in the situation where I have to make a two-dimential plot of a  
> set. If I simplify my data it would be something along the lines of  
> wanting to plot {x,y| x^2+y^2 < = 1}.
> I am aware of the contour and persp plot, but cannot figure out how  
> to convert one of those to draw the set. I have tried to google  
> different ways of plotting in R but have not been able to find a  
> method through that either.

I don't see a third dimension implied in what you presented:

x <- runif(1000)
y <- runif(1000)
plot(x[x^2 +y^2 < 1], y[x^2 +y^2 < 1])
title(main="Uncorrelated X and Y ointly satisfying condition")

-- 

David Winsemius, MD
West Hartford, CT

Here is a solution using contour:

x <- y <- seq(-1.5,1.5,length=100)
z <- outer(x, y, function(x,y) x^2+y^2)

contour(x,y,z, levels=1)



-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of . .
> Sent: Sunday, February 20, 2011 2:41 AM
> To: r-help at r-project.org
> Subject: [R] Plot of set
> 
> 
> I am in the situation where I have to make a two-dimential plot of a
> set. If I simplify my data it would be something along the lines of
> wanting to plot {x,y| x^2+y^2 < = 1}.
> I am aware of the contour and persp plot, but cannot figure out how to
> convert one of those to draw the set. I have tried to google different
> ways of plotting in R but have not been able to find a method through
> that either.
> 
> Thanks in advance
> 
> Lise
> 	[[alternative HTML version deleted]]
> 
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