D3 Color & Size Legends

Color and Size Legends

This example demonstrates how to create separate legends for categorical color scales and quantitative size scales in D3.js. A color legend maps fruit names to distinct colors using `d3.scaleOrdinal`, while a size legend uses `d3.scaleSqrt` to show the relationship between numeric values and circle radii. The legends are built from reusable custom components (`colorLegend` and `sizeLegend`) that generate SVG groups with circles and text labels, using the `enter`/`merge` pattern for efficient updates. Ticks for the size scale are generated via `sizeScale.ticks()` and filtered to exclude zero.

Bbprokopowicz

Color and Size Legend

This example demonstrates two custom legend components built with D3 v5: a categorical color legend for fruit categories and a quantitative size legend for a numeric scale. The color legend maps ordinal domain values to a range of colors using `scaleOrdinal`, while the size legend uses `scaleSqrt` to translate tick values into circle radii. Both legends render as SVG groups with circles and text labels, with spacing and offsets applied via `attr("transform")` and positioned within an `svg` element.

KKazushige Okuma

D3 Color and Size Legends

This example demonstrates two reusable D3 legend components rendered as SVG: a color legend for ordinal scales and a size legend for quantitative scales. The color legend displays fruit categories as colored circles with labels, while the size legend visualizes numeric values through scaled circle radii. Both components use D3’s selection join pattern with `selection.enter` and `selection.merge` to update elements. The size legend relies on `scaleSqrt.ticks` to generate tick values, while the color legend maps ordinal domain values to a range of colors via `scaleOrdinal`.

Rrdeichert

Color and size legends

This example demonstrates two custom legend components: a color legend for ordinal data and a size legend for quantitative data. The color legend displays four fruit categories with distinct colors, while the size legend maps numeric values to circle radii. Both legends use D3 v5’s `scaleOrdinal` and `scaleSqrt`, with reusable functions `colorLegend` and `sizeLegend` that bind data to SVG groups. Circles and text labels are positioned via transforms, with tick values generated by `sizeScale.ticks(numTicks)`. The SVG rendering includes configurable spacing, text offsets, and fill styles.

SSophia Murage

Color and Size Legends

This example demonstrates two reusable legend components in D3 v5: a color legend for ordinal scales and a size legend for quantitative scales. The color legend maps fruit names to distinct colors using `scaleOrdinal`, while the size legend uses `scaleSqrt` to represent numeric ticks as proportional circle radii. Both legends are rendered as SVG groups with circles and text, using `.call()` to apply the component functions. The size legend filters out zero values and reverses tick order to display larger circles first.

Nnkohdatavis

Color and Size Legends

This example demonstrates two custom D3.js legend components rendered as SVG. A color legend uses `scaleOrdinal` with categorical domains to map fruit names to distinct colors, while a size legend uses `scaleSqrt` to map a numeric range to circle radii. Both legends are built by dynamically appending `g` groups with circle and text elements, using D3's enter/merge/exit pattern for updates. The code relies on D3 v5 selection methods and scale APIs to generate the visual encodings.

PPabloReyesBetanzo

Color and size legend

This example demonstrates two custom D3 legend components rendered as SVG: a color legend for categorical values and a size legend for continuous quantitative values. The color legend uses `scaleOrdinal` to map fruit names to distinct colors, while the size legend employs `scaleSqrt` to translate numeric ticks into circle radii. Both legends rely on D3 v5’s data join pattern with enter/merge/exit selections, and the size legend filters out zero values from `ticks()` while setting explicit spacing and circle fill properties.

YYedrup

Color and Size Legends

Two reusable D3 v5 legend components render categorical and quantitative scales side by side in SVG. A color legend uses `scaleOrdinal` to map fruit names to colored circles, while a size legend uses `scaleSqrt` with `ticks` to display varying radii for a numeric domain. Both components handle enter, update, and exit selections via `selection.data`, `merge`, and exit removal, positioning circles and labels with spacing and text offsets.

ZZ-Richard