scale_radius or other explanation of how to control radius

[jebyrnes]

This is an AWESOME package. But when I plot using it, I get very small pies! And changing size doesn't work well at all - only works on the black outlines and not the fills. If I set color = NA, I still have the same small pies! Using the code from the vignette, the below should produce two plots with different point sizes. But it does not.

Is there a way to either have a scale_scatterpie_radius_manual control or maybe just an easy way to manually set the size of those pies? Even to have size with with the fill and not just the colored part of the pie would be great!

#small pies
ggplot() + geom_scatterpie(aes(x=long, y=lat, group=region), data=d,
                           cols=LETTERS[1:4], radius = 1, color = NA) + coord_equal()

#large pies
ggplot() + geom_scatterpie(aes(x=long, y=lat, group=region), data=d,
                           cols=LETTERS[1:4], radius = 10, color = NA) + coord_equal()

[shu251]

Is there resolution on how to modify the pie size? @GuangchuangYu
I've tried following the vignette, but it does not work.

[nyrvelli]

try pie_scale: from http://www.endmemo.com/r/geom_scatterpie.php