Use the symbols function!

-----Original Message-----

From: "Luca Quaglia" <

[hidden email]>

To: "

[hidden email]" <

[hidden email]>

Sent: 3/9/07 2:55 PM

Subject: [R] About "cex=": how to improve resolution?

Hi,

I need to plot a graph with a circle of radius 1 and

with a series of points of different size. The size of

these points compared to the fixed circle is important

and bears a meaning.

Here is the a simplified version of the code I'm

using:

x<-seq(0,2,by=0.2)

y<-x

z<-seq(0,1,by=0.1)

angle<-pi/180*c(0:359)

par(pty="s")

plot(-2:2,-2:2,type="n")

lines(cos(angle),sin(angle))

points(x,y,cex=z)

I obtain points of the same size when

cex=0.1/0.2/0.3/0.4 or cex=0.5/0.6/0.7 or

cex=0.8/0.9/1.0.

Please, does anyone know if there is a way of

improving the resolution of cex in order to have 10

points *all* of different size (respecting the above

written different values of cex)? The circle is fixed

of radius 1 and the values of cex are in relation with

that and they shouldn't be modified.

Thanks, Luca

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