area.x1([x]) If x is specified, sets the x1 accessor to the specified function or number and returns this area generator. If x is not specified, returns the current x1 accessor, which defaults to null, indicating that the previously-computed x0 value should be reused for the x1 value. When an area is generated, the x1 accessor will be invoked for each defined element in the input data array, being passed the element d, the index i, and the array data as three arguments. See area.x0 for more

D3 API Reference D3 4.0 is a collection of modules 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 3.x and 4.0, see CHANGES; see also the 3.x reference. Arrays (Statistics, Search, Transformations, Histograms) Axes Brushes Chords Collections (Objects, Maps, Sets, Nests) Color

zoom.filter([filter]) If filter is specified, sets the filter to the specified function and returns the zoom behavior. If filter is not specified, returns the current filter, which defaults to: function filter() { return !event.button; } If the filter returns falsey, the initiating event is ignored and no zoom gestures are started. Thus, the filter determines which input events are ignored. The default filter ignores mousedown events on secondary buttons, since those buttons are typically

armadillo.parallel([parallel]) Defaults to 20°.

d3.precisionPrefix(step, value) Returns a suggested decimal precision for use with locale.formatPrefix given the specified numeric step and reference value. The step represents the minimum absolute difference between values that will be formatted, and value determines which SI prefix will be used. (This assumes that the values to be formatted are also multiples of step.) For example, given the numbers 1.1e6, 1.2e6, and 1.3e6, the step should be 1e5, the value could be 1.3e6, and the suggested

d3.geoCraig() d3.geoCraigRaw(phi) The Craig retroazimuthal projection. Note: this projection tends to fold over itself if the standard parallel is non-zero; we have not yet implemented the necessary advanced clipping to avoid overlap.

d3.isoFormat The full ISO 8601 UTC time formatter. Where available, this method will use Date.toISOString to format.

d3.timeMondays(start, stop[, step]) d3.utcMondays(start, stop[, step]) Aliases for timeMonday.range and utcMonday.range.

pie.padAngle([angle]) If angle is specified, sets the pad angle to the specified function or number and returns this pie generator. If angle is not specified, returns the current pad angle accessor, which defaults to: function padAngle() { return 0; } The pad angle here means the angular separation between each adjacent arc. The total amount of padding reserved is the specified angle times the number of elements in the input data array, and at most |endAngle - startAngle|; the remaining sp

simulation.restart() Restarts the simulation’s internal timer and returns the simulation. In conjunction with simulation.alphaTarget or simulation.alpha, this method can be used to “reheat” the simulation during interaction, such as when dragging a node, or to resume the simulation after temporarily pausing it with simulation.stop.