Investigate visualization of factors and groups

[agbeltran]

Consider R package: ggparallel

Visualise groups and their sizes, replication, power analysis.

[proccaserra]

while the use cases are the one i reported, not sure parallel coordinates would help our audience

[agbeltran]

I am not saying we should use parallel coordinates :)

[agbeltran]

Idea from Pablo about factors: