All functions

circleFun()

Draw circle https://stackoverflow.com/questions/6862742/draw-a-circle-with-ggplot2

ggonion()

Draw onion diagram

iterative_get_y0()

Hlpr to iterative calculate y coord bias for circles center using previous circle precalculated value

iterative_get_y_label()

Calculate labels y coord as middle between upper half of circles

make_color()

Check color vector if provided, if not - generate colors

prepare_circles_df()

Prepare dataframe with circles parameters