Charts by Szum

Chart authoring: - x/y/text/label.field and non-# fill/stroke must name data keys. Pie: x for category, y for value (finite numbers); fill normally matches x. Literals are #RGB/#RRGGBB. Paint: fill for area/pie/text; stroke for rule; either (not both) for line; either/both for dot/bar. Defaults need x/y keys. - Share top-level data; use mark data for different rows. - Fill/stroke fields create series; group only arranges existing bar series as stack (default) or dodge. If rows share a position, encode a series or aggregate. Areas stack. - Prefer built-in labels; reserve text for free-positioned annotations. Hide a fully labeled value axis only when readers do not need its scale. - Bar and area value axes stay linear and include zero. Explicit base-10 log scales require positive finite values and domains; use line or dot. - For chronological annual trends, use "YYYY" strings, map x: "year", and set x to { type: "utc", tickFormat: "%Y" }. Do not invent dates. Categorical years may stay b