transition.selectAll(selector) For each selected element, selects all descendant elements that match the specified selector string, if any, and returns a transition on the resulting selection. The selector may be specified either as a selector string or a function. If a function, it is evaluated for each selected element, in order, being passed the current datum d and index i, with the this context as the current DOM element. The new transition has the same id, name and timing as this transi

interpolate.gamma(gamma) Given that interpolate is one of interpolateRgb, interpolateCubehelix or interpolateCubehelixLong, returns a new interpolator factory of the same type using the specified gamma. For example, to interpolate from purple to orange with a gamma of 2.2 in RGB space: var interpolator = d3.interpolateRgb.gamma(2.2)("purple", "orange"); See Eric Brasseur’s article, Gamma error in picture scaling, for more on gamma correction.

d3.symbolCircle The circle symbol type.

transition.attrs(values) Like selection.attrs, but for transition.attr.

center.y([y]) If y is specified, sets the y-coordinate of the centering position to the specified number and returns this force. If y is not specified, returns the current y-coordinate, which defaults to zero.

nest.entries(array) Applies the nest operator to the specified array, returning an array of key-values entries. Conceptually, this is similar to applying map.entries to the associative array returned by nest.map, but it applies to every level of the hierarchy rather than just the first (outermost) level. Each entry in the returned array corresponds to a distinct key value returned by the first key function. The entry value depends on the number of registered key functions: if there is an add

manyBody.strength([strength]) If strength is specified, sets the strength accessor to the specified number or function, re-evaluates the strength accessor for each node, and returns this force. A positive value causes nodes to attract each other, similar to gravity, while a negative value causes nodes to repel each other, similar to electrostatic charge. If strength is not specified, returns the current strength accessor, which defaults to: function strength() { return -30; } The strength

continuous.interpolate(interpolate) If interpolate is specified, sets the scale’s range interpolator factory. This interpolator factory is used to create interpolators for each adjacent pair of values from the range; these interpolators then map a normalized domain parameter t in [0, 1] to the corresponding value in the range. If factory is not specified, returns the scale’s current interpolator factory, which defaults to interpolate. See d3-interpolate for more interpolators. For example, c

d3.hierarchy(data[, children]) Constructs a root node from the specified hierarchical data. The specified data must be an object representing the root node. For example: { "name": "Eve", "children": [ { "name": "Cain" }, { "name": "Seth", "children": [ { "name": "Enos" }, { "name": "Noam" } ] }, { "name": "Abel" }, { "name": "Awan", "children": [ { "n

band.round([round]) If round is specified, enables or disables rounding accordingly. If rounding is enabled, the start and stop of each band will be integers. Rounding is sometimes useful for avoiding antialiasing artifacts, though also consider the shape-rendering “crispEdges” styles. Note that if the width of the domain is not a multiple of the cardinality of the range, there may be leftover unused space, even without padding! Use band.align to specify how the leftover space is distributed