To cut or not to cut (the Y axis)

A collection of common dataviz caveats by

Cutting or not cutting the Y-axis is probably one of the most disputed topics in data visualization, as here, here and here. Basically, the issue is whether or not the Y-axis should always start at zero. Let’s try to find out why it is a struggle to gain consensus on this topic.

When it is bad

Let’s start with a barplot showing the issue: