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plotting circles / piecharts with only one category

2 messages · Moritz Lennert, Ross Ihaka

#
Hello,

For further use in a cartography program, I would like to create a bunch of 
eps files with circles in graduated gray shades (5 different shades). Up 
to now I've been using 'piechart' for this, but since I only have one 
single category I get a central line in the circles which is not very 
aesthetic. Is there a way to keep piechart from drawing this central line, 
or is there a function that would allow me to draw simple circles in 
different gray shades ?

Moritz

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#
Moritz Lennert wrote:
The function you want is called "symbols".  E.g.

x <- runif(10)
y <- runif(10)
r <- (1+runif(10))/2
plot(x, y, type="n", xlim=c(0,1), ylim=c(0,1), axes=F, ann=F)
symbols(x,y,circles=r,inches=.5,bg=gray((1:10)/10))

Ross
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