Color and Size Legends

Color and Size Legends

This example demonstrates two SVG legends for mapping data to visual channels. The color legend uses a `scaleOrdinal` with domain categories and a range of colors, while the size legend uses `scaleSqrt` with five ticks to show proportional circle radii. Both legends are implemented as reusable functions, `colorLegend` and `sizeLegend`, which bind data to groups and update circles and text elements. The code uses D3 v5 selections, `enter`/`merge`/`exit` patterns, and SVG attributes like `r`, `fill`, and `transform` for layout.

Zzlastefcia

Color and Size Legends

This example demonstrates two reusable legend components for D3 visualizations. The color legend maps a categorical color scale to labeled circles, while the size legend uses a square-root scale to vary circle radii across numeric ticks. Both legends are implemented as custom D3 functions (`colorLegend` and `sizeLegend`) that append SVG groups with circles and text. The code uses `d3.scaleOrdinal` and `d3.scaleSqrt` to define the scales, and the rendering is done with SVG elements on a 960×500 canvas.

Hhenry1987

Color and Size Legends

This example demonstrates two distinct legend techniques for encoding data values. The color legend maps ordinal categories like "apple" and "lemon" to distinct colors using `d3.scaleOrdinal`. The size legend uses `d3.scaleSqrt` to translate a continuous numeric range from 0 to 10 into proportional circle radii, with tick labels derived from the scale's `.ticks()` method. Both legends are built as custom SVG components that render groups of circles and text, with the size legend's circles using a semi-transparent fill. The code relies on D3 v5's selection and merge APIs, and the `d3.select` function, to efficiently create and update the SVG elements.

RRubens

Color and Size Legends

This example demonstrates two reusable legend components built with D3 v5: a color legend using `scaleOrdinal` for categorical data and a size legend using `scaleSqrt` for quantitative data. The color legend renders colored circles with domain labels, while the size legend displays circles scaled proportionally to tick values with corresponding text offsets. Both legends are implemented as modular functions that append SVG groups and circles, using D3’s selection and merge pattern to handle updates efficiently.

AAegon95

Color and Size Legends

This example demonstrates how to construct separate color and size legends using D3 v5. A color legend maps ordinal categories to distinct colors, while a size legend uses a square root scale to represent numeric values with varying circle radii. The code defines reusable `colorLegend` and `sizeLegend` functions that handle tick creation, circle rendering, and text labels, then calls them with `selection.call()`. Both legends render as SVG groups with styled text and outlined circles, using `scaleOrdinal` and `scaleSqrt` from the d3 module.

Ccodexmon

Color and Size Legends

This example demonstrates two legend styles for D3 visualizations: a color legend mapping ordinal categories to colors, and a size legend mapping a square-root scale to circle radii. The color legend displays four fruit labels next to colored circles, while the size legend shows five tick values with circles whose areas scale with the data. Both legends are built as reusable SVG components using D3's selection API, with `scaleOrdinal` and `scaleSqrt` defining the mappings. The code uses `.call()` to invoke the legend functions and `merge()` to handle updates efficiently.

Aannadehtiarova

Color and Size Legends

This example demonstrates two distinct legend types: a color legend with ordinal categories for fruits and a size legend with a square-root scale mapping numeric values to circle radii. Using D3 v5, it renders SVG circles and text labels, with the color legend employing `scaleOrdinal` and the size legend using `scaleSqrt` with tick generation. The size legend positions circles based on cumulative radius sums with spacing, while both legends use reusable functions (`colorLegend` and `sizeLegend`) called via D3’s selection `.call()` pattern.

GGuillaume Calmettes

Color and Size Legends

This example demonstrates two distinct types of legends for data visualization: a color legend and a size legend. The color legend maps categorical fruit names to distinct colors using `scaleOrdinal`, while the size legend uses `scaleSqrt` to represent numeric values with proportional circle radii. Both legends are rendered as SVG groups, with circles and text labels positioned using `attr('transform', ...)`. The code employs D3 v5's selection and merge methods to efficiently update the legends, and the circles are styled with a black stroke for visual clarity.

MMihir Sawant