Does the world need another Venn tool?

You may think the world has enough Venn.
Venndir boldly suggests there is room for more,
with arrows and a point to make.

Some gene sets don’t just overlap—they lean in.

This book illustrates the need for directionality in a Venn diagram, particularly for biological data where genes are often the basis for comparison. In the study of genes and their effects, change isn't just a matter of up or down -- it can signify sickness or health, disease or cure, even life or death.

The arrows aren't just decorative, they're judgmental.

It is quietly satisfying when Venndir reveals that two sets, although overlapping, are moving in different directions, surfacing inconsistencies that might otherwise be missed. It's a reminder that clarity doesn't just come from what overlaps, but from how things move together.

Visualize with purpose. Annotate with direction.

One of the most challenging parts of making a Venn diagram is placing the labels.
Who knew?
Venndir provides many techniques to position labels, customize colors, fonts, and lines; even insert images or other graphics. It handles a lot of text font quirks so you can avoid the hassle, and focus on how Venndir renders.

Putting ‘What is that again?’ to rest, one label at a time.

Perhaps the most surprising 'favorite feature' in Venndir is its ability to display items inside the Venn diagram. The best data visualizations anticipate the next question, and most often it is simply:
‘What are those?’

Inspired by curiosity, designed for clarity, sharpened by use.

Venndir exists because I really enjoyed the process of creating it. Many of the features were born of random ideas that grew into challenges to see if it could be done. The idea list is still impossibly long, and that gives me great joy.

There were many pitfalls on the road to creating Venndir -- many lessons learned, many helpful suggestions, and many advances by other incredible R packages.

Venndir came together from many pitfalls, learned lessons, shared insights, and new capabilities. The aim was to create a clear first figure with immediate insight, then offer enough customizations to evolve into a great final figure. Venndir has met these goals, and so here we are.