# Libraries
library(packcircles)
library(ggplot2)
Create data
data <- data.frame(group=paste("Group", letters[1:20]), value=sample(seq(1,100),20))
Generate the layout. This function return a dataframe with one line per bubble.
It gives its center (x and y) and its radius, proportional of the value
packing <- circleProgressiveLayout(data$value, sizetype='area')
We can add these packing information to the initial data frame
data <- cbind(data, packing)
Check that radius is proportional to value. We don't want a linear relationship, since it is the AREA that must be proportionnal to the value
plot(dataradius, datavalue)
The next step is to go from one center + a radius to the coordinates of a circle that
is drawn by a multitude of straight lines.
dat.gg <- circleLayoutVertices(packing, npoints=50)
Make the plot
ggplot() +
Make the bubbles
geom_polygon(data = dat.gg, aes(x, y, group = id, fill=as.factor(id)), colour = "black", alpha = 0.6) +
Add text in the center of each bubble + control its size
geom_text(data = data, aes(x, y, size=value, label = group)) +

scale_size_continuous(range = c(1,4)) +
General theme:
theme_void() +

theme(legend.position="none") +

coord_equal()