Track 01 · Foundations
How the eye reads a chart
Position, length, colour, area — ranked by how accurately people read them.
The principles
- 1 Position — most accurate — bars and points on a shared axis.
- 2 Length — very accurate — the basis of every bar chart.
- 3 Colour & area — least accurate — good for grouping, bad for exact values.
Hard to judge which slice wins.
Easy to compare precisely.