How to get percentages on the y axes in an alluvial or sankey plot?

Question

I realized this graph using ggplot2 and I\'d like to change y axes to percentages, from 0% to 100% with breaks every 10. I know I can use:

+ scale_y         


        

Answer 1

Simply normalising your y-values seems to do the trick:

library(ggplot2)

ggplot(mtcars, aes(x = cyl, y = mpg/max(mpg))) +
  geom_point() +
  scale_y_continuous(label = scales::label_percent())

^{Created on 2020-05-19 by the reprex package (v0.3.0)}