Version Compatibility

Reference examples tested with: ComplexUpset 1.3+ (R, Krassowski), UpSetR 1.4.0 (last 2019 release; effectively unmaintained), upsetplot 0.9+ (Python).

Before using code patterns, verify installed versions match. If versions differ:

• R: packageVersion('<pkg>') then ?function_name
• Python: pip show <package> then help(module.function)

If code throws ImportError, AttributeError, or TypeError, introspect the installed package and adapt the example to match the actual API rather than retrying.

UpSet Plots

"Show set intersections for 4+ sets" -> Replace Venn diagrams (which become illegible past 4 sets) with UpSet (Lex 2014 IEEE TVCG 20:1983). The display: a matrix of dots indicating which sets participate in each intersection, with a vertical bar above each column showing intersection size and horizontal bars on the left showing per-set total size. Sort by intersection size (cardinality) for "biggest overlaps first" or by degree (number of sets) for grouped layout.

• R: ComplexUpset::upset (Krassowski; ggplot2-native, recommended), UpSetR::upset (Conway 2017; legacy, unmaintained)
• Python: upsetplot.UpSet

The Single Most Important Modern Insight -- UpSetR Is Effectively Unmaintained