[R] symbols: zero radius circles are drawn.

[Stephen Eglen]

Hi,

I don't think this is a bug, but I thought I'd mention it in case
others think it is not correct... I guess it is probably just a
rounding error.

If I use symbols() to draw some circles, any circle with radius of
zero gets drawn as a small circle.  As an example:

postscript(file="test.ps")
symbols(1:9, rep(2,9),
         circles=seq(from=0.05, to=0.0, length=9),
         inches=FALSE, xlim=c(0, 10), ylim=c(1,3))
dev.off()

The rightmost circle should be of radius 0, but looking at the plot it is
drawn bigger than both the previous two circles.

The workaround I used was to change any radius of 0 to NA so that no
circle is then drawn.

Stephen



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