Alluvial Diagrams

http://datavizproject.com/data-type/alluvial-diagram/

https://cran.r-project.org/web/packages/alluvial/vignettes/alluvial.html

Alluvial Diagrams in ggplot2

http://corybrunson.github.io/ggalluvial/articles/ggalluvial.html

In jamovi & Clinical Workflows

• ClinicoPathDescriptives: Features an integrated alluvial module (under Exploration ▸ ClinicoPath Descriptive Plots) that generates interactive alluvial diagrams for patient trajectories, treatment stages, and outcome flows using both ggalluvial and easyalluvial engines.