dataviz

Match the chart to the data relationship: bar charts for comparing discrete categories, line charts for trends over time, pie charts for part-to-whole with 2-3 segments, tables for precise lookup under 20 values, and small multiples for comparing many series across one variable.

The data-ink ratio is the proportion of ink devoted to non-redundant data display divided by total ink used, from Edward Tufte. Maximize it by erasing non-data-ink like heavy grids, 3D effects, and decorative elements, then erasing redundant data-ink.

Use a pie chart only for part-to-whole comparisons with 2-3 segments, starting the largest slice at 12 o'clock and never exceeding 5-7 segments. For more categories or precise comparison, use a bar chart with the Y-axis starting at zero.

No, it never generates designs. It informs, critiques, and advises on visualization choices, providing evaluation checklists, construction rules, and tool-specific guidance for SVG, D3.js, Figma, InDesign, Illustrator, and Affinity.

Clutter usually comes from chartjunk: heavy grid lines, 3D effects, redundant labels, and decorative color. Remove everything that does not represent data variation, use gray for structural elements, and label data directly instead of using legends.