Multi Chart
This multi-chart visualization explores the OASIS MRI and Alzheimer’s dataset, showing relationships between brain volume, dementia status, education, age, and gender. Four scatter plots juxtapose variables like normalized brain volume (nWBV) and estimated total intracranial volume (eTIV), with color and size encoding categorical and ordinal fields. The charts are constructed using the vega-lite-api, which wraps Vega-Lite and Vega, rendering SVG via a view configured with a tooltip handler. Data is loaded from a CSV URL using d3.csv.