Bubble Chart - Custral Docs

A bubble chart, scatter with a third value as point size.

When to use

A Bubble chart is a Scatter chart with a third dimension encoded as bubble size. Use it when you have three numeric metrics per record and want to spot outliers and clusters at a glance.

Required data shape

X axis: numeric property.
Y axis: numeric property.
Size: numeric property used as the bubble area.

Configuration

Setting	What it does
X-axis	The metric plotted along the horizontal axis.
Y-axis	The metric plotted along the vertical axis.
Size	The metric that drives each bubble’s area.
Color by	An optional property whose values color the bubbles.

Limitations

More than ~200 records becomes hard to read.
Size mapping is by area, not radius, small differences in the underlying value look smaller than they really are.