d3/API.md

Data-Driven Documents

# D3 API Reference

D3 is a [collection of modules](https://github.com/d3) that are designed to work together; you can use the modules independently, or you can use them together as part of the default build. The source and documentation for each module is available in its repository. Follow the links below to learn more. For changes between major versions, see [CHANGES](https://github.com/d3/d3/blob/master/CHANGES.md); see also the [release notes](https://github.com/d3/d3/releases) and the [3.x reference](https://github.com/d3/d3-3.x-api-reference/blob/master/API-Reference.md).

* [Arrays](#arrays-d3-array) ([Statistics](#statistics), [Search](#search), [Transformations](#transformations), [Histograms](#histograms))
* [Axes](#axes-d3-axis)
* [Brushes](#brushes-d3-brush)
* [Chords](#chords-d3-chord)
* [Collections](#collections-d3-collection) ([Objects](#objects), [Maps](#maps), [Sets](#sets), [Nests](#nests))
* [Colors](#colors-d3-color)
* [Color Schemes](#color-schemes-d3-scale-chromatic)
* [Contours](#contours-d3-contour)
* [Dispatches](#dispatches-d3-dispatch)
* [Dragging](#dragging-d3-drag)
* [Delimiter-Separated Values](#delimiter-separated-values-d3-dsv)
* [Easings](#easings-d3-ease)
* [Fetches](#fetches-d3-fetch)
* [Forces](#forces-d3-force)
* [Number Formats](#number-formats-d3-format)
* [Geographies](#geographies-d3-geo) ([Paths](#paths), [Projections](#projections), [Spherical Math](#spherical-math), [Spherical Shapes](#spherical-shapes), [Streams](#streams), [Transforms](#transforms))
* [Hierarchies](#hierarchies-d3-hierarchy)
* [Interpolators](#interpolators-d3-interpolate)
* [Paths](#paths-d3-path)
* [Polygons](#polygons-d3-polygon)
* [Quadtrees](#quadtrees-d3-quadtree)
* [Random Numbers](#random-numbers-d3-random)
* [Scales](#scales-d3-scale) ([Continuous](#continuous-scales), [Sequential](#sequential-scales), [Diverging](#diverging-scales), [Quantize](#quantize-scales), [Ordinal](#ordinal-scales))
* [Selections](#selections-d3-selection) ([Selecting](#selecting-elements), [Modifying](#modifying-elements), [Data](#joining-data), [Events](#handling-events), [Control](#control-flow), [Local Variables](#local-variables), [Namespaces](#namespaces))
* [Shapes](#shapes-d3-shape) ([Arcs](#arcs), [Pies](#pies), [Lines](#lines), [Areas](#areas), [Curves](#curves), [Links](#links), [Symbols](#symbols), [Stacks](#stacks))
* [Time Formats](#time-formats-d3-time-format)
* [Time Intervals](#time-intervals-d3-time)
* [Timers](#timers-d3-timer)
* [Transitions](#transitions-d3-transition)
* [Voronoi Diagrams](#voronoi-diagrams-d3-voronoi)
* [Zooming](#zooming-d3-zoom)

D3 uses [semantic versioning](http://semver.org/). The current version is exposed as d3.version.

## [Arrays (d3-array)](https://github.com/d3/d3-array)

Array manipulation, ordering, searching, summarizing, etc.

### [Statistics](https://github.com/d3/d3-array/blob/master/README.md#statistics)

Methods for computing basic summary statistics.

* [d3.min](https://github.com/d3/d3-array/blob/master/README.md#min) - compute the minimum value in an array.
* [d3.max](https://github.com/d3/d3-array/blob/master/README.md#max) - compute the maximum value in an array.
* [d3.extent](https://github.com/d3/d3-array/blob/master/README.md#extent) - compute the minimum and maximum value in an array.
* [d3.sum](https://github.com/d3/d3-array/blob/master/README.md#sum) - compute the sum of an array of numbers.
* [d3.mean](https://github.com/d3/d3-array/blob/master/README.md#mean) - compute the arithmetic mean of an array of numbers.
* [d3.median](https://github.com/d3/d3-array/blob/master/README.md#median) - compute the median of an array of numbers (the 0.5-quantile).
* [d3.quantile](https://github.com/d3/d3-array/blob/master/README.md#quantile) - compute a quantile for a sorted array of numbers.
* [d3.variance](https://github.com/d3/d3-array/blob/master/README.md#variance) - compute the variance of an array of numbers.
* [d3.deviation](https://github.com/d3/d3-array/blob/master/README.md#deviation) - compute the standard deviation of an array of numbers.

### [Search](https://github.com/d3/d3-array/blob/master/README.md#search)

Methods for searching arrays for a specific element.

* [d3.scan](https://github.com/d3/d3-array/blob/master/README.md#scan) - linear search for an element using a comparator.
* [d3.bisect](https://github.com/d3/d3-array/blob/master/README.md#bisect) - binary search for a value in a sorted array.
* [d3.bisectRight](https://github.com/d3/d3-array/blob/master/README.md#bisectRight) - binary search for a value in a sorted array.
* [d3.bisectLeft](https://github.com/d3/d3-array/blob/master/README.md#bisectLeft) - binary search for a value in a sorted array.
* [d3.bisector](https://github.com/d3/d3-array/blob/master/README.md#bisector) - bisect using an accessor or comparator.
* [*bisector*.left](https://github.com/d3/d3-array/blob/master/README.md#bisector_left) - bisectLeft, with the given comparator.
* [*bisector*.right](https://github.com/d3/d3-array/blob/master/README.md#bisector_right) - bisectRight, with the given comparator.
* [d3.ascending](https://github.com/d3/d3-array/blob/master/README.md#ascending) - compute the natural order of two values.
* [d3.descending](https://github.com/d3/d3-array/blob/master/README.md#descending) - compute the natural order of two values.

### [Transformations](https://github.com/d3/d3-array/blob/master/README.md#transformations)

Methods for transforming arrays and for generating new arrays.

* [d3.cross](https://github.com/d3/d3-array/blob/master/README.md#cross) - compute the Cartesian product of two arrays.
* [d3.merge](https://github.com/d3/d3-array/blob/master/README.md#merge) - merge multiple arrays into one array.
* [d3.pairs](https://github.com/d3/d3-array/blob/master/README.md#pairs) - create an array of adjacent pairs of elements.
* [d3.permute](https://github.com/d3/d3-array/blob/master/README.md#permute) - reorder an array of elements according to an array of indexes.
* [d3.shuffle](https://github.com/d3/d3-array/blob/master/README.md#shuffle) - randomize the order of an array.
* [d3.ticks](https://github.com/d3/d3-array/blob/master/README.md#ticks) - generate representative values from a numeric interval.
* [d3.tickIncrement](https://github.com/d3/d3-array/blob/master/README.md#tickIncrement) - generate representative values from a numeric interval.
* [d3.tickStep](https://github.com/d3/d3-array/blob/master/README.md#tickStep) - generate representative values from a numeric interval.
* [d3.range](https://github.com/d3/d3-array/blob/master/README.md#range) - generate a range of numeric values.
* [d3.transpose](https://github.com/d3/d3-array/blob/master/README.md#transpose) - transpose an array of arrays.
* [d3.zip](https://github.com/d3/d3-array/blob/master/README.md#zip) - transpose a variable number of arrays.

### [Histograms](https://github.com/d3/d3-array/blob/master/README.md#histograms)

Bin discrete samples into continuous, non-overlapping intervals.

* [d3.histogram](https://github.com/d3/d3-array/blob/master/README.md#histogram) - create a new histogram generator.
* [*histogram*](https://github.com/d3/d3-array/blob/master/README.md#_histogram) - compute the histogram for the given array of samples.
* [*histogram*.value](https://github.com/d3/d3-array/blob/master/README.md#histogram_value) - specify a value accessor for each sample.
* [*histogram*.domain](https://github.com/d3/d3-array/blob/master/README.md#histogram_domain) - specify the interval of observable values.
* [*histogram*.thresholds](https://github.com/d3/d3-array/blob/master/README.md#histogram_thresholds) - specify how values are divided into bins.
* [d3.thresholdFreedmanDiaconis](https://github.com/d3/d3-array/blob/master/README.md#thresholdFreedmanDiaconis) - the Freedman–Diaconis binning rule.
* [d3.thresholdScott](https://github.com/d3/d3-array/blob/master/README.md#thresholdScott) - Scott’s normal reference binning rule.
* [d3.thresholdSturges](https://github.com/d3/d3-array/blob/master/README.md#thresholdSturges) - Sturges’ binning formula.

## [Axes (d3-axis)](https://github.com/d3/d3-axis)

Human-readable reference marks for scales.

* [d3.axisTop](https://github.com/d3/d3-axis/blob/master/README.md#axisTop) - create a new top-oriented axis generator.
* [d3.axisRight](https://github.com/d3/d3-axis/blob/master/README.md#axisRight) - create a new right-oriented axis generator.
* [d3.axisBottom](https://github.com/d3/d3-axis/blob/master/README.md#axisBottom) - create a new bottom-oriented axis generator.
* [d3.axisLeft](https://github.com/d3/d3-axis/blob/master/README.md#axisLeft) - create a new left-oriented axis generator.
* [*axis*](https://github.com/d3/d3-axis/blob/master/README.md#_axis) - generate an axis for the given selection.
* [*axis*.scale](https://github.com/d3/d3-axis/blob/master/README.md#axis_scale) - set the scale.
* [*axis*.ticks](https://github.com/d3/d3-axis/blob/master/README.md#axis_ticks) - customize how ticks are generated and formatted.
* [*axis*.tickArguments](https://github.com/d3/d3-axis/blob/master/README.md#axis_tickArguments) - customize how ticks are generated and formatted.
* [*axis*.tickValues](https://github.com/d3/d3-axis/blob/master/README.md#axis_tickValues) - set the tick values explicitly.
* [*axis*.tickFormat](https://github.com/d3/d3-axis/blob/master/README.md#axis_tickFormat) - set the tick format explicitly.
* [*axis*.tickSize](https://github.com/d3/d3-axis/blob/master/README.md#axis_tickSize) - set the size of the ticks.
* [*axis*.tickSizeInner](https://github.com/d3/d3-axis/blob/master/README.md#axis_tickSizeInner) - set the size of inner ticks.
* [*axis*.tickSizeOuter](https://github.com/d3/d3-axis/blob/master/README.md#axis_tickSizeOuter) - set the size of outer (extent) ticks.
* [*axis*.tickPadding](https://github.com/d3/d3-axis/blob/master/README.md#axis_tickPadding) - set the padding between ticks and labels.

## [Brushes (d3-brush)](https://github.com/d3/d3-brush)

Select a one- or two-dimensional region using the mouse or touch.

* [d3.brush](https://github.com/d3/d3-brush/blob/master/README.md#brush) - create a new two-dimensional brush.
* [d3.brushX](https://github.com/d3/d3-brush/blob/master/README.md#brushX) - create a brush along the *x*-dimension.
* [d3.brushY](https://github.com/d3/d3-brush/blob/master/README.md#brushY) - create a brush along the *y*-dimension.
* [*brush*](https://github.com/d3/d3-brush/blob/master/README.md#_brush) - apply the brush to a selection.
* [*brush*.move](https://github.com/d3/d3-brush/blob/master/README.md#brush_move) - move the brush selection.
* [*brush*.extent](https://github.com/d3/d3-brush/blob/master/README.md#brush_extent) - define the brushable region.
* [*brush*.filter](https://github.com/d3/d3-brush/blob/master/README.md#brush_filter) - control which input events initiate brushing.
* [*brush*.handleSize](https://github.com/d3/d3-brush/blob/master/README.md#brush_handleSize) - set the size of the brush handles.
* [*brush*.on](https://github.com/d3/d3-brush/blob/master/README.md#brush_on) - listen for brush events.
* [d3.brushSelection](https://github.com/d3/d3-brush/blob/master/README.md#brushSelection) - get the brush selection for a given node.

## [Chords (d3-chord)](https://github.com/d3/d3-chord)

* [d3.chord](https://github.com/d3/d3-chord/blob/master/README.md#chord) - create a new chord layout.
* [*chord*](https://github.com/d3/d3-chord/blob/master/README.md#_chord) - compute the layout for the given matrix.
* [*chord*.padAngle](https://github.com/d3/d3-chord/blob/master/README.md#chord_padAngle) - set the padding between adjacent groups.
* [*chord*.sortGroups](https://github.com/d3/d3-chord/blob/master/README.md#chord_sortGroups) - define the group order.
* [*chord*.sortSubgroups](https://github.com/d3/d3-chord/blob/master/README.md#chord_sortSubgroups) - define the source and target order within groups.
* [*chord*.sortChords](https://github.com/d3/d3-chord/blob/master/README.md#chord_sortChords) - define the chord order across groups.
* [d3.ribbon](https://github.com/d3/d3-chord/blob/master/README.md#ribbon) - create a ribbon shape generator.
* [*ribbon*](https://github.com/d3/d3-chord/blob/master/README.md#_ribbon) - generate a ribbon shape.
* [*ribbon*.source](https://github.com/d3/d3-chord/blob/master/README.md#ribbon_source) - set the source accessor.
* [*ribbon*.target](https://github.com/d3/d3-chord/blob/master/README.md#ribbon_target) - set the target accessor.
* [*ribbon*.radius](https://github.com/d3/d3-chord/blob/master/README.md#ribbon_radius) - set the ribbon source or target radius.
* [*ribbon*.startAngle](https://github.com/d3/d3-chord/blob/master/README.md#ribbon_startAngle) - set the ribbon source or target start angle.
* [*ribbon*.endAngle](https://github.com/d3/d3-chord/blob/master/README.md#ribbon_endAngle) - set the ribbon source or target end angle.
* [*ribbon*.context](https://github.com/d3/d3-chord/blob/master/README.md#ribbon_context) - set the render context.

## [Collections (d3-collection)](https://github.com/d3/d3-collection)

Handy data structures for elements keyed by string.

### [Objects](https://github.com/d3/d3-collection/blob/master/README.md#objects)

Methods for converting associative arrays (objects) to arrays.

* [d3.keys](https://github.com/d3/d3-collection/blob/master/README.md#keys) - list the keys of an associative array.
* [d3.values](https://github.com/d3/d3-collection/blob/master/README.md#values) - list the values of an associated array.
* [d3.entries](https://github.com/d3/d3-collection/blob/master/README.md#entries) - list the key-value entries of an associative array.

### [Maps](https://github.com/d3/d3-collection/blob/master/README.md#maps)

Like ES6 Map, but with string keys and a few other differences.

* [d3.map](https://github.com/d3/d3-collection/blob/master/README.md#map) - create a new, empty map.
* [*map*.has](https://github.com/d3/d3-collection/blob/master/README.md#map_has) - returns true if the map contains the given key.
* [*map*.get](https://github.com/d3/d3-collection/blob/master/README.md#map_get) - get the value for the given key.
* [*map*.set](https://github.com/d3/d3-collection/blob/master/README.md#map_set) - set the value for the given key.
* [*map*.remove](https://github.com/d3/d3-collection/blob/master/README.md#map_remove) - remove the entry for given key.
* [*map*.clear](https://github.com/d3/d3-collection/blob/master/README.md#map_clear) - remove all entries.
* [*map*.keys](https://github.com/d3/d3-collection/blob/master/README.md#map_keys) - get the array of keys.
* [*map*.values](https://github.com/d3/d3-collection/blob/master/README.md#map_values) - get the array of values.
* [*map*.entries](https://github.com/d3/d3-collection/blob/master/README.md#map_entries) - get the array of entries (key-values objects).
* [*map*.each](https://github.com/d3/d3-collection/blob/master/README.md#map_each) - call a function for each entry.
* [*map*.empty](https://github.com/d3/d3-collection/blob/master/README.md#map_empty) - returns false if the map has at least one entry.
* [*map*.size](https://github.com/d3/d3-collection/blob/master/README.md#map_size) - compute the number of entries.

### [Sets](https://github.com/d3/d3-collection/blob/master/README.md#sets)

Like ES6 Set, but with string keys and a few other differences.

* [d3.set](https://github.com/d3/d3-collection/blob/master/README.md#set) - create a new, empty set.
* [*set*.has](https://github.com/d3/d3-collection/blob/master/README.md#set_has) - returns true if the set contains the given value.
* [*set*.add](https://github.com/d3/d3-collection/blob/master/README.md#set_add) - add the given value.
* [*set*.remove](https://github.com/d3/d3-collection/blob/master/README.md#set_remove) - remove the given value.
* [*set*.clear](https://github.com/d3/d3-collection/blob/master/README.md#set_clear) - remove all values.
* [*set*.values](https://github.com/d3/d3-collection/blob/master/README.md#set_values) - get the array of values.
* [*set*.each](https://github.com/d3/d3-collection/blob/master/README.md#set_each) - call a function for each value.
* [*set*.empty](https://github.com/d3/d3-collection/blob/master/README.md#set_empty) - returns true if the set has at least one value.
* [*set*.size](https://github.com/d3/d3-collection/blob/master/README.md#set_size) - compute the number of values.

### [Nests](https://github.com/d3/d3-collection/blob/master/README.md#nests)

Group data into arbitrary hierarchies.

* [d3.nest](https://github.com/d3/d3-collection/blob/master/README.md#nest) - create a new nest generator.
* [*nest*.key](https://github.com/d3/d3-collection/blob/master/README.md#nest_key) - add a level to the nest hierarchy.
* [*nest*.sortKeys](https://github.com/d3/d3-collection/blob/master/README.md#nest_sortKeys) - sort the current nest level by key.
* [*nest*.sortValues](https://github.com/d3/d3-collection/blob/master/README.md#nest_sortValues) - sort the leaf nest level by value.
* [*nest*.rollup](https://github.com/d3/d3-collection/blob/master/README.md#nest_rollup) - specify a rollup function for leaf values.
* [*nest*.map](https://github.com/d3/d3-collection/blob/master/README.md#nest_map) - generate the nest, returning a map.
* [*nest*.object](https://github.com/d3/d3-collection/blob/master/README.md#nest_object) - generate the nest, returning an associative array.
* [*nest*.entries](https://github.com/d3/d3-collection/blob/master/README.md#nest_entries) - generate the nest, returning an array of key-values tuples.

## [Colors (d3-color)](https://github.com/d3/d3-color)

Color manipulation and color space conversion.

* [d3.color](https://github.com/d3/d3-color/blob/master/README.md#color) - parse the given CSS color specifier.
* [*color*.rgb](https://github.com/d3/d3-color/blob/master/README.md#color_rgb) - compute the RGB equivalent of this color.
* [*color*.brighter](https://github.com/d3/d3-color/blob/master/README.md#color_brighter) - create a brighter copy of this color.
* [*color*.darker](https://github.com/d3/d3-color/blob/master/README.md#color_darker) - create a darker copy of this color.
* [*color*.displayable](https://github.com/d3/d3-color/blob/master/README.md#color_displayable) - returns true if the color is displayable on standard hardware.
* [*color*.hex](https://github.com/d3/d3-color/blob/master/README.md#color_hex) - returns the hexadecimal RGB string representation of this color.
* [*color*.toString](https://github.com/d3/d3-color/blob/master/README.md#color_toString) - returns the RGB string representation of this color.
* [d3.rgb](https://github.com/d3/d3-color/blob/master/README.md#rgb) - create a new RGB color.
* [d3.hsl](https://github.com/d3/d3-color/blob/master/README.md#hsl) - create a new HSL color.
* [d3.lab](https://github.com/d3/d3-color/blob/master/README.md#lab) - create a new Lab color.
* [d3.hcl](https://github.com/d3/d3-color/blob/master/README.md#hcl) - create a new HCL color.
* [d3.lch](https://github.com/d3/d3-color/blob/master/README.md#lch) - create a new HCL color.
* [d3.gray](https://github.com/d3/d3-color/blob/master/README.md#gray) - create a new Lab gray.
* [d3.cubehelix](https://github.com/d3/d3-color/blob/master/README.md#cubehelix) - create a new Cubehelix color.

## [Color Schemes (d3-scale-chromatic)](https://github.com/d3/d3-scale-chromatic)

Color ramps and palettes for quantitative, ordinal and categorical scales.

### Categorical

* [d3.schemeCategory10](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeCategory10) -
* [d3.schemeAccent](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeAccent) -
* [d3.schemeDark2](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeDark2) -
* [d3.schemePaired](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePaired) -
* [d3.schemePastel1](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePastel1) -
* [d3.schemePastel2](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePastel2) -
* [d3.schemeSet1](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeSet1) -
* [d3.schemeSet2](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeSet2) -
* [d3.schemeSet3](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeSet3) -

### Diverging

* [d3.interpolateBrBG](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePiYG](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePRGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePuOr](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateRdBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateRdGy](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateRdYlBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateRdYlGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateSpectral](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.schemeBrBG](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeBrBG) -
* [d3.schemePiYG](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePiYG) -
* [d3.schemePRGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePRGn) -
* [d3.schemePuOr](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePuOr) -
* [d3.schemeRdBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeRdBu) -
* [d3.schemeRdGy](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeRdGy) -
* [d3.schemeRdYlBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeRdYlBu) -
* [d3.schemeRdYlGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeRdYlGn) -
* [d3.schemeSpectral](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeSpectral) -

### Sequential (Single Hue)

* [d3.interpolateBlues](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateGreens](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateGreys](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateOranges](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePurples](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateReds](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.schemeBlues](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeBlues) -
* [d3.schemeGreens](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeGreens) -
* [d3.schemeGreys](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeGreys) -
* [d3.schemeOranges](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeOranges) -
* [d3.schemePurples](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePurples) -
* [d3.schemeReds](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeReds) -

### Sequential (Multi-Hue)

* [d3.interpolateBuGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateBuPu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateCool](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateCubehelixDefault](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateGnBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateInferno](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateMagma](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateOrRd](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePlasma](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePuBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePuBuGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolatePuRd](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateRdPu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateViridis](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateWarm](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateYlGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateYlGnBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateYlOrBr](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.interpolateYlOrRd](https://github.com/d3/d3-scale-chromatic/blob/master/README.md) -
* [d3.schemeBuGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeBuGn) -
* [d3.schemeBuPu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeBuPu) -
* [d3.schemeGnBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeGnBu) -
* [d3.schemeOrRd](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeOrRd) -
* [d3.schemePuBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePuBu) -
* [d3.schemePuBuGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePuBuGn) -
* [d3.schemePuRd](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemePuRd) -
* [d3.schemeRdPu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeRdPu) -
* [d3.schemeYlGn](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeYlGn) -
* [d3.schemeYlGnBu](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeYlGnBu) -
* [d3.schemeYlOrBr](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeYlOrBr) -
* [d3.schemeYlOrRd](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#schemeYlOrRd) -

### Cyclical

* [d3.interpolateRainbow](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#interpolateRainbow) - the “less-angry” rainbow
* [d3.interpolateSinebow](https://github.com/d3/d3-scale-chromatic/blob/master/README.md#interpolateSinebow) - the “sinebow” smooth rainbow

## [Contours (d3-contour)](https://github.com/d3/d3-contour)

Compute contour polygons using marching squares.

* [d3.contours](https://github.com/d3/d3-contour/blob/master/README.md#contours) - create a new contour generator.
* [contours](https://github.com/d3/d3-contour/blob/master/README.md#_contours) - compute the contours for a given grid of values.
* [contours.contour](https://github.com/d3/d3-contour/blob/master/README.md#contours_contour) -
* [contours.size](https://github.com/d3/d3-contour/blob/master/README.md#contours_size) -
* [contours.smooth](https://github.com/d3/d3-contour/blob/master/README.md#contours_smooth) -
* [contours.thresholds](https://github.com/d3/d3-contour/blob/master/README.md#contours_thresholds) -
* [d3.contourDensity](https://github.com/d3/d3-contour/blob/master/README.md#contourDensity) - create a new density estimator.
* [density](https://github.com/d3/d3-contour/blob/master/README.md#_density) - estimate the density of a given array of samples.
* [density.x](https://github.com/d3/d3-contour/blob/master/README.md#density_x) -
* [density.y](https://github.com/d3/d3-contour/blob/master/README.md#density_y) -
* [density.cellSize](https://github.com/d3/d3-contour/blob/master/README.md#density_cellSize) -
* [density.thresholds](https://github.com/d3/d3-contour/blob/master/README.md#density_thresholds) -
* [density.bandwidth](https://github.com/d3/d3-contour/blob/master/README.md#density_bandwidth) -
* [density.weight](https://github.com/d3/d3-contour/blob/master/README.md#density_weight) -

## [Dispatches (d3-dispatch)](https://github.com/d3/d3-dispatch)

Separate concerns using named callbacks.

* [d3.dispatch](https://github.com/d3/d3-dispatch/blob/master/README.md#dispatch) - create a custom event dispatcher.
* [*dispatch*.on](https://github.com/d3/d3-dispatch/blob/master/README.md#dispatch_on) - register or unregister an event listener.
* [*dispatch*.copy](https://github.com/d3/d3-dispatch/blob/master/README.md#dispatch_copy) - create a copy of a dispatcher.
* [*dispatch*.*call*](https://github.com/d3/d3-dispatch/blob/master/README.md#dispatch_call) - dispatch an event to registered listeners.
* [*dispatch*.*apply*](https://github.com/d3/d3-dispatch/blob/master/README.md#dispatch_apply) - dispatch an event to registered listeners.

## [Dragging (d3-drag)](https://github.com/d3/d3-drag)

Drag and drop SVG, HTML or Canvas using mouse or touch input.

* [d3.drag](https://github.com/d3/d3-drag/blob/master/README.md#drag) - create a drag behavior.
* [*drag*](https://github.com/d3/d3-drag/blob/master/README.md#_drag) - apply the drag behavior to a selection.
* [*drag*.container](https://github.com/d3/d3-drag/blob/master/README.md#drag_container) - set the coordinate system.
* [*drag*.filter](https://github.com/d3/d3-drag/blob/master/README.md#drag_filter) - ignore some initiating input events.
* [*drag*.touchable](https://github.com/d3/d3-drag/blob/master/README.md#drag_touchable) - set the touch support detector.
* [*drag*.subject](https://github.com/d3/d3-drag/blob/master/README.md#drag_subject) - set the thing being dragged.
* [*drag*.clickDistance](https://github.com/d3/d3-drag/blob/master/README.md#drag_clickDistance) - set the click distance threshold.
* [*drag*.on](https://github.com/d3/d3-drag/blob/master/README.md#drag_on) - listen for drag events.
* [*event*.on](https://github.com/d3/d3-drag/blob/master/README.md#event_on) - listen for drag events on the current gesture.
* [d3.dragDisable](https://github.com/d3/d3-drag/blob/master/README.md#dragDisable) - prevent native drag-and-drop and text selection.
* [d3.dragEnable](https://github.com/d3/d3-drag/blob/master/README.md#dragEnable) - enable native drag-and-drop and text selection.

## [Delimiter-Separated Values (d3-dsv)](https://github.com/d3/d3-dsv)

Parse and format delimiter-separated values, most commonly CSV and TSV.

* [d3.dsvFormat](https://github.com/d3/d3-dsv/blob/master/README.md#dsvFormat) - create a new parser and formatter for the given delimiter.
* [*dsv*.parse](https://github.com/d3/d3-dsv/blob/master/README.md#dsv_parse) - parse the given string, returning an array of objects.
* [*dsv*.parseRows](https://github.com/d3/d3-dsv/blob/master/README.md#dsv_parseRows) - parse the given string, returning an array of rows.
* [*dsv*.format](https://github.com/d3/d3-dsv/blob/master/README.md#dsv_format) - format the given array of objects.
* [*dsv*.formatRows](https://github.com/d3/d3-dsv/blob/master/README.md#dsv_formatRows) - format the given array of rows.
* [d3.csvParse](https://github.com/d3/d3-dsv/blob/master/README.md#csvParse) - parse the given CSV string, returning an array of objects.
* [d3.csvParseRows](https://github.com/d3/d3-dsv/blob/master/README.md#csvParseRows) - parse the given CSV string, returning an array of rows.
* [d3.csvFormat](https://github.com/d3/d3-dsv/blob/master/README.md#csvFormat) - format the given array of objects as CSV.
* [d3.csvFormatRows](https://github.com/d3/d3-dsv/blob/master/README.md#csvFormatRows) - format the given array of rows as CSV.
* [d3.tsvParse](https://github.com/d3/d3-dsv/blob/master/README.md#tsvParse) - parse the given TSV string, returning an array of objects.
* [d3.tsvParseRows](https://github.com/d3/d3-dsv/blob/master/README.md#tsvParseRows) - parse the given TSV string, returning an array of rows.
* [d3.tsvFormat](https://github.com/d3/d3-dsv/blob/master/README.md#tsvFormat) - format the given array of objects as TSV.
* [d3.tsvFormatRows](https://github.com/d3/d3-dsv/blob/master/README.md#tsvFormatRows) - format the given array of rows as TSV.

## [Easings (d3-ease)](https://github.com/d3/d3-ease)

Easing functions for smooth animation.

* [*ease*](https://github.com/d3/d3-ease/blob/master/README.md#_ease) - ease the given normalized time.
* [d3.easeLinear](https://github.com/d3/d3-ease/blob/master/README.md#easeLinear) - linear easing; the identity function.
* [d3.easePolyIn](https://github.com/d3/d3-ease/blob/master/README.md#easePolyIn) - polynomial easing; raises time to the given power.
* [d3.easePolyOut](https://github.com/d3/d3-ease/blob/master/README.md#easePolyOut) - reverse polynomial easing.
* [d3.easePolyInOut](https://github.com/d3/d3-ease/blob/master/README.md#easePolyInOut) - symmetric polynomial easing.
* [*poly*.exponent](https://github.com/d3/d3-ease/blob/master/README.md#poly_exponent) - specify the polynomial exponent.
* [d3.easeQuad](https://github.com/d3/d3-ease/blob/master/README.md#easeQuad) - an alias for easeQuadInOut.
* [d3.easeQuadIn](https://github.com/d3/d3-ease/blob/master/README.md#easeQuadIn) - quadratic easing; squares time.
* [d3.easeQuadOut](https://github.com/d3/d3-ease/blob/master/README.md#easeQuadOut) - reverse quadratic easing.
* [d3.easeQuadInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeQuadInOut) - symmetric quadratic easing.
* [d3.easeCubic](https://github.com/d3/d3-ease/blob/master/README.md#easeCubic) - an alias for easeCubicInOut.
* [d3.easeCubicIn](https://github.com/d3/d3-ease/blob/master/README.md#easeCubicIn) - cubic easing; cubes time.
* [d3.easeCubicOut](https://github.com/d3/d3-ease/blob/master/README.md#easeCubicOut) - reverse cubic easing.
* [d3.easeCubicInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeCubicInOut) - symmetric cubic easing.
* [d3.easeSin](https://github.com/d3/d3-ease/blob/master/README.md#easeSin) - an alias for easeSinInOut.
* [d3.easeSinIn](https://github.com/d3/d3-ease/blob/master/README.md#easeSinIn) - sinusoidal easing.
* [d3.easeSinOut](https://github.com/d3/d3-ease/blob/master/README.md#easeSinOut) - reverse sinusoidal easing.
* [d3.easeSinInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeSinInOut) - symmetric sinusoidal easing.
* [d3.easeExp](https://github.com/d3/d3-ease/blob/master/README.md#easeExp) - an alias for easeExpInOut.
* [d3.easeExpIn](https://github.com/d3/d3-ease/blob/master/README.md#easeExpIn) - exponential easing.
* [d3.easeExpOut](https://github.com/d3/d3-ease/blob/master/README.md#easeExpOut) - reverse exponential easing.
* [d3.easeExpInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeExpInOut) - symmetric exponential easing.
* [d3.easeCircle](https://github.com/d3/d3-ease/blob/master/README.md#easeCircle) - an alias for easeCircleInOut.
* [d3.easeCircleIn](https://github.com/d3/d3-ease/blob/master/README.md#easeCircleIn) - circular easing.
* [d3.easeCircleOut](https://github.com/d3/d3-ease/blob/master/README.md#easeCircleOut) - reverse circular easing.
* [d3.easeCircleInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeCircleInOut) - symmetric circular easing.
* [d3.easeElastic](https://github.com/d3/d3-ease/blob/master/README.md#easeElastic) - an alias for easeElasticOut.
* [d3.easeElasticIn](https://github.com/d3/d3-ease/blob/master/README.md#easeElasticIn) - elastic easing, like a rubber band.
* [d3.easeElasticOut](https://github.com/d3/d3-ease/blob/master/README.md#easeElasticOut) - reverse elastic easing.
* [d3.easeElasticInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeElasticInOut) - symmetric elastic easing.
* [*elastic*.amplitude](https://github.com/d3/d3-ease/blob/master/README.md#elastic_amplitude) - specify the elastic amplitude.
* [*elastic*.period](https://github.com/d3/d3-ease/blob/master/README.md#elastic_period) - specify the elastic period.
* [d3.easeBack](https://github.com/d3/d3-ease/blob/master/README.md#easeBack) - an alias for easeBackInOut.
* [d3.easeBackIn](https://github.com/d3/d3-ease/blob/master/README.md#easeBackIn) - anticipatory easing, like a dancer bending his knees before jumping.
* [d3.easeBackOut](https://github.com/d3/d3-ease/blob/master/README.md#easeBackOut) - reverse anticipatory easing.
* [d3.easeBackInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeBackInOut) - symmetric anticipatory easing.
* [*back*.overshoot](https://github.com/d3/d3-ease/blob/master/README.md#back_overshoot) - specify the amount of overshoot.
* [d3.easeBounce](https://github.com/d3/d3-ease/blob/master/README.md#easeBounce) - an alias for easeBounceOut.
* [d3.easeBounceIn](https://github.com/d3/d3-ease/blob/master/README.md#easeBounceIn) - bounce easing, like a rubber ball.
* [d3.easeBounceOut](https://github.com/d3/d3-ease/blob/master/README.md#easeBounceOut) - reverse bounce easing.
* [d3.easeBounceInOut](https://github.com/d3/d3-ease/blob/master/README.md#easeBounceInOut) - symmetric bounce easing.

## [Fetches (d3-fetch)](https://github.com/d3/d3-fetch)

Convenience methods on top of the Fetch API.

* [d3.blob](https://github.com/d3/d3-fetch/blob/master/README.md#blob) - get a file as a blob.
* [d3.buffer](https://github.com/d3/d3-fetch/blob/master/README.md#buffer) - get a file as an array buffer.
* [d3.csv](https://github.com/d3/d3-fetch/blob/master/README.md#csv) - get a comma-separated values (CSV) file.
* [d3.dsv](https://github.com/d3/d3-fetch/blob/master/README.md#dsv) - get a delimiter-separated values (CSV) file.
* [d3.image](https://github.com/d3/d3-fetch/blob/master/README.md#image) - get an image.
* [d3.json](https://github.com/d3/d3-fetch/blob/master/README.md#json) - get a JSON file.
* [d3.text](https://github.com/d3/d3-fetch/blob/master/README.md#text) - get a plain text file.
* [d3.tsv](https://github.com/d3/d3-fetch/blob/master/README.md#tsv) - get a tab-separated values (TSV) file.

## [Forces (d3-force)](https://github.com/d3/d3-force)

Force-directed graph layout using velocity Verlet integration.

* [d3.forceSimulation](https://github.com/d3/d3-force/blob/master/README.md#forceSimulation) - create a new force simulation.
* [*simulation*.restart](https://github.com/d3/d3-force/blob/master/README.md#simulation_restart) - reheat and restart the simulation’s timer.
* [*simulation*.stop](https://github.com/d3/d3-force/blob/master/README.md#simulation_stop) - stop the simulation’s timer.
* [*simulation*.tick](https://github.com/d3/d3-force/blob/master/README.md#simulation_tick) - advance the simulation one step.
* [*simulation*.nodes](https://github.com/d3/d3-force/blob/master/README.md#simulation_nodes) - set the simulation’s nodes.
* [*simulation*.alpha](https://github.com/d3/d3-force/blob/master/README.md#simulation_alpha) - set the current alpha.
* [*simulation*.alphaMin](https://github.com/d3/d3-force/blob/master/README.md#simulation_alphaMin) - set the minimum alpha threshold.
* [*simulation*.alphaDecay](https://github.com/d3/d3-force/blob/master/README.md#simulation_alphaDecay) - set the alpha exponential decay rate.
* [*simulation*.alphaTarget](https://github.com/d3/d3-force/blob/master/README.md#simulation_alphaTarget) - set the target alpha.
* [*simulation*.velocityDecay](https://github.com/d3/d3-force/blob/master/README.md#simulation_velocityDecay) - set the velocity decay rate.
* [*simulation*.force](https://github.com/d3/d3-force/blob/master/README.md#simulation_force) - add or remove a force.
* [*simulation*.find](https://github.com/d3/d3-force/blob/master/README.md#simulation_find) - find the closest node to the given position.
* [*simulation*.on](https://github.com/d3/d3-force/blob/master/README.md#simulation_on) - add or remove an event listener.
* [*force*](https://github.com/d3/d3-force/blob/master/README.md#_force) - apply the force.
* [*force*.initialize](https://github.com/d3/d3-force/blob/master/README.md#force_initialize) - initialize the force with the given nodes.
* [d3.forceCenter](https://github.com/d3/d3-force/blob/master/README.md#forceCenter) - create a centering force.
* [*center*.x](https://github.com/d3/d3-force/blob/master/README.md#center_x) - set the center *x*-coordinate.
* [*center*.y](https://github.com/d3/d3-force/blob/master/README.md#center_y) - set the center *y*-coordinate.
* [d3.forceCollide](https://github.com/d3/d3-force/blob/master/README.md#forceCollide) - create a circle collision force.
* [*collide*.radius](https://github.com/d3/d3-force/blob/master/README.md#collide_radius) - set the circle radius.
* [*collide*.strength](https://github.com/d3/d3-force/blob/master/README.md#collide_strength) - set the collision resolution strength.
* [*collide*.iterations](https://github.com/d3/d3-force/blob/master/README.md#collide_iterations) - set the number of iterations.
* [d3.forceLink](https://github.com/d3/d3-force/blob/master/README.md#forceLink) - create a link force.
* [*link*.links](https://github.com/d3/d3-force/blob/master/README.md#link_links) - set the array of links.
* [*link*.id](https://github.com/d3/d3-force/blob/master/README.md#link_id) - link nodes by numeric index or string identifier.
* [*link*.distance](https://github.com/d3/d3-force/blob/master/README.md#link_distance) - set the link distance.
* [*link*.strength](https://github.com/d3/d3-force/blob/master/README.md#link_strength) - set the link strength.
* [*link*.iterations](https://github.com/d3/d3-force/blob/master/README.md#link_iterations) - set the number of iterations.
* [d3.forceManyBody](https://github.com/d3/d3-force/blob/master/README.md#forceManyBody) - create a many-body force.
* [*manyBody*.strength](https://github.com/d3/d3-force/blob/master/README.md#manyBody_strength) - set the force strength.
* [*manyBody*.theta](https://github.com/d3/d3-force/blob/master/README.md#manyBody_theta) - set the Barnes–Hut approximation accuracy.
* [*manyBody*.distanceMin](https://github.com/d3/d3-force/blob/master/README.md#manyBody_distanceMin) - limit the force when nodes are close.
* [*manyBody*.distanceMax](https://github.com/d3/d3-force/blob/master/README.md#manyBody_distanceMax) - limit the force when nodes are far.
* [d3.forceX](https://github.com/d3/d3-force/blob/master/README.md#forceX) - create an *x*-positioning force.
* [*x*.strength](https://github.com/d3/d3-force/blob/master/README.md#x_strength) - set the force strength.
* [*x*.x](https://github.com/d3/d3-force/blob/master/README.md#x_x) - set the target *x*-coordinate.
* [d3.forceY](https://github.com/d3/d3-force/blob/master/README.md#forceY) - create an *y*-positioning force.
* [*y*.strength](https://github.com/d3/d3-force/blob/master/README.md#y_strength) - set the force strength.
* [*y*.y](https://github.com/d3/d3-force/blob/master/README.md#y_y) - set the target *y*-coordinate.
* [d3.forceRadial](https://github.com/d3/d3-force/blob/master/README.md#forceRadial) - create a radial positioning force.
* [*radial*.strength](https://github.com/d3/d3-force/blob/master/README.md#radial_strength) - set the force strength.
* [*radial*.radius](https://github.com/d3/d3-force/blob/master/README.md#radial_radius) - set the target radius.
* [*radial*.x](https://github.com/d3/d3-force/blob/master/README.md#radial_x) - set the target center *x*-coordinate.
* [*radial*.y](https://github.com/d3/d3-force/blob/master/README.md#radial_y) - set the target center *y*-coordinate.

## [Number Formats (d3-format)](https://github.com/d3/d3-format)

Format numbers for human consumption.

* [d3.format](https://github.com/d3/d3-format/blob/master/README.md#format) - alias for *locale*.format on the default locale.
* [d3.formatPrefix](https://github.com/d3/d3-format/blob/master/README.md#formatPrefix) - alias for *locale*.formatPrefix on the default locale.
* [d3.formatSpecifier](https://github.com/d3/d3-format/blob/master/README.md#formatSpecifier) - parse a number format specifier.
* [d3.formatLocale](https://github.com/d3/d3-format/blob/master/README.md#formatLocale) - define a custom locale.
* [d3.formatDefaultLocale](https://github.com/d3/d3-format/blob/master/README.md#formatDefaultLocale) - define the default locale.
* [*locale*.format](https://github.com/d3/d3-format/blob/master/README.md#locale_format) - create a number format.
* [*locale*.formatPrefix](https://github.com/d3/d3-format/blob/master/README.md#locale_formatPrefix) - create a SI-prefix number format.
* [d3.precisionFixed](https://github.com/d3/d3-format/blob/master/README.md#precisionFixed) - compute decimal precision for fixed-point notation.
* [d3.precisionPrefix](https://github.com/d3/d3-format/blob/master/README.md#precisionPrefix) - compute decimal precision for SI-prefix notation.
* [d3.precisionRound](https://github.com/d3/d3-format/blob/master/README.md#precisionRound) - compute significant digits for rounded notation.

## [Geographies (d3-geo)](https://github.com/d3/d3-geo)

Geographic projections, shapes and math.

### [Paths](https://github.com/d3/d3-geo/blob/master/README.md#paths)

* [d3.geoPath](https://github.com/d3/d3-geo/blob/master/README.md#geoPath) - create a new geographic path generator.
* [*path*](https://github.com/d3/d3-geo/blob/master/README.md#_path) - project and render the specified feature.
* [*path*.area](https://github.com/d3/d3-geo/blob/master/README.md#path_area) - compute the projected planar area of a given feature.
* [*path*.bounds](https://github.com/d3/d3-geo/blob/master/README.md#path_bounds) - compute the projected planar bounding box of a given feature.
* [*path*.centroid](https://github.com/d3/d3-geo/blob/master/README.md#path_centroid) - compute the projected planar centroid of a given feature.
* [*path*.measure](https://github.com/d3/d3-geo/blob/master/README.md#path_measure) - compute the projected planar length of a given feature.
* [*path*.projection](https://github.com/d3/d3-geo/blob/master/README.md#path_projection) - set the geographic projection.
* [*path*.context](https://github.com/d3/d3-geo/blob/master/README.md#path_context) - set the render context.
* [*path*.pointRadius](https://github.com/d3/d3-geo/blob/master/README.md#path_pointRadius) - set the radius to display point features.

### [Projections](https://github.com/d3/d3-geo/blob/master/README.md#projections)

* [*projection*](https://github.com/d3/d3-geo/blob/master/README.md#_projection) - project the specified point from the sphere to the plane.
* [*projection*.invert](https://github.com/d3/d3-geo/blob/master/README.md#projection_invert) - unproject the specified point from the plane to the sphere.
* [*projection*.stream](https://github.com/d3/d3-geo/blob/master/README.md#projection_stream) - wrap the specified stream to project geometry.
* [*projection*.clipAngle](https://github.com/d3/d3-geo/blob/master/README.md#projection_clipAngle) - set the radius of the clip circle.
* [*projection*.clipExtent](https://github.com/d3/d3-geo/blob/master/README.md#projection_clipExtent) - set the viewport clip extent, in pixels.
* [*projection*.angle](https://github.com/d3/d3-geo/blob/master/README.md#projection_angle) - set the post-projection rotation.
* [*projection*.scale](https://github.com/d3/d3-geo/blob/master/README.md#projection_scale) - set the scale factor.
* [*projection*.translate](https://github.com/d3/d3-geo/blob/master/README.md#projection_translate) - set the translation offset.
* [*projection*.fitExtent](https://github.com/d3/d3-geo/blob/master/README.md#projection_fitExtent) - set the scale and translate to fit a GeoJSON object.
* [*projection*.fitSize](https://github.com/d3/d3-geo/blob/master/README.md#projection_fitSize) - set the scale and translate to fit a GeoJSON object.
* [*projection*.fitWidth](https://github.com/d3/d3-geo/blob/master/README.md#projection_fitWidth) - set the scale and translate to fit a GeoJSON object.
* [*projection*.fitHeight](https://github.com/d3/d3-geo/blob/master/README.md#projection_fitHeight) - set the scale and translate to fit a GeoJSON object.
* [*projection*.center](https://github.com/d3/d3-geo/blob/master/README.md#projection_center) - set the center point.
* [*projection*.rotate](https://github.com/d3/d3-geo/blob/master/README.md#projection_rotate) - set the three-axis spherical rotation angles.
* [*projection*.precision](https://github.com/d3/d3-geo/blob/master/README.md#projection_precision) - set the precision threshold for adaptive sampling.
* [*projection*.preclip](https://github.com/d3/d3-geo/blob/master/README.md#projection.preclip) - set the spherical clipping stream transform.
* [*projection*.postclip](https://github.com/d3/d3-geo/blob/master/README.md#projection.postclip) - set the planar clipping stream transform.
* [d3.geoClipAntimeridian](https://github.com/d3/d3-geo/blob/master/README.md#geoClipAntimeridian) - cuts spherical geometries that cross the antimeridian.
* [d3.geoClipCircle](https://github.com/d3/d3-geo/blob/master/README.md#geoClipCircle) - clips spherical geometries to a small circle.
* [d3.geoClipRectangle](https://github.com/d3/d3-geo/blob/master/README.md#geoClipRectangle) - clips planar geometries to a rectangular viewport.
* [d3.geoAlbers](https://github.com/d3/d3-geo/blob/master/README.md#geoAlbers) - the Albers equal-area conic projection.
* [d3.geoAlbersUsa](https://github.com/d3/d3-geo/blob/master/README.md#geoAlbersUsa) - a composite Albers projection for the United States.
* [d3.geoAzimuthalEqualArea](https://github.com/d3/d3-geo/blob/master/README.md#geoAzimuthalEqualArea) - the azimuthal equal-area projection.
* [d3.geoAzimuthalEquidistant](https://github.com/d3/d3-geo/blob/master/README.md#geoAzimuthalEquidistant) - the azimuthal equidistant projection.
* [d3.geoConicConformal](https://github.com/d3/d3-geo/blob/master/README.md#geoConicConformal) - the conic conformal projection.
* [d3.geoConicEqualArea](https://github.com/d3/d3-geo/blob/master/README.md#geoConicEqualArea) - the conic equal-area (Albers) projection.
* [d3.geoConicEquidistant](https://github.com/d3/d3-geo/blob/master/README.md#geoConicEquidistant) - the conic equidistant projection.
* [*conic*.parallels](https://github.com/d3/d3-geo/blob/master/RE