[R] plotting circles / piecharts with only one category

[Moritz Lennert]

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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