[R] symbols plots - with circles

[DispersionMap]

Im doing a plot where i look at clusters of data with circles indicating how
big the cluster is:

palette(rainbow(1000, end = 0.9))
symbols(data$lab, data$bak, circles = var21, main = "Circles Plot", fg =
"grey", bg = 1:1000)


As i have lots and lots of data points to plot i get alot of circles.

The problem is that wjen i use colour in the circles the big circles cover
up the smaller ones sitting underneath.

What i really want is different sizes of circles to have different colours.


Any ideas how to fix this???





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