[R-sig-Geo] Class range on bubble plot

[Simeon]

Hi,

Forgive me for this nonsense, I should have check the distribution before
defining the cutting classes on my example. But I still do not understand
what key.entries really do.

When I look to your plot


Samuel Turgeon wrote
> 
> bubble(meuse["zinc"], maxsize=3, key.entries = c(100,500,700,2000))
> 

It seems that there is more circles types on the map than on the legend. Is
each circle on the map represents the exact value of the measuring point? Or
is there a classification of measuring points, and if so how works it?


When I play with the key.entries values, it seems that the circles on the
map are not affected (just the legend).

classIntervals(meuse$zinc,4,style="equal")
bubble(meuse["zinc"], maxsize=3, key.entries = c(544.5,976,1407.5,1839))

classIntervals(meuse$zinc,4,style="quantile")
bubble(meuse["zinc"], maxsize=3, key.entries = c(198,326,674.5,1839))

classIntervals(meuse$zinc,4,style="jenks")
bubble(meuse["zinc"], maxsize=3, key.entries = c(432,833,1190,1839))


And I don't understand why.

Thanks in advance

Siméon



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