d3.curveCardinal(context) Produces a cubic cardinal spline using the specified control points, with one-sided differences used for the first and last piece. The default tension is 0.

cluster.size([size]) If size is specified, sets this cluster layout’s size to the specified two-element array of numbers [width, height] and returns this cluster layout. If size is not specified, returns the current layout size, which defaults to [1, 1]. A layout size of null indicates that a node size will be used instead. The coordinates x and y represent an arbitrary coordinate system; for example, to produce a radial layout, a size of [360, radius] corresponds to a breadth of 360° and a

d3.geoInterruptedSinuMollweide() Alan K. Philbrick’s interrupted sinu-Mollweide projection.

d3.geoMollweide() d3.geoMollweideRaw The equal-area, pseudocylindrical Mollweide projection. The oblique aspect is known as the Atlantis projection. Goode’s interrupted Mollweide is also widely known.

cluster.nodeSize([size]) If size is specified, sets this cluster layout’s node size to the specified two-element array of numbers [width, height] and returns this cluster layout. If size is not specified, returns the current node size, which defaults to null. A node size of null indicates that a layout size will be used instead. When a node size is specified, the root node is always positioned at ⟨0, 0⟩.

d3.thresholdScott(values, min, max) Returns the number of bins according to Scott’s normal reference rule; the input values must be numbers.

d3.geoInterruptedMollweideHemispheres() The Mollweide projection interrupted into two (equal-area) hemispheres.

set.values() Returns an array of the string values in this set. The order of the returned values is arbitrary. Can be used as a convenient way of computing the unique values for a set of strings. For example: d3.set(["foo", "bar", "foo", "baz"]).values(); // "foo", "bar", "baz"

selection.lower() Re-inserts each selected element, in order, as the first child of its parent. Equivalent to: selection.each(function() { this.parentNode.insertBefore(this, this.parentNode.firstChild); });

d3.schemeSet1 An array of nine categorical colors represented as RGB hexadecimal strings.