stream.point(x, y[, z]) Indicates a point with the specified coordinates x and y (and optionally z). The coordinate system is unspecified and implementation-dependent; for example, projection streams require spherical coordinates in degrees as input. Outside the context of a polygon or line, a point indicates a point geometry object (Point or MultiPoint). Within a line or polygon ring, the point indicates a control point.

d3.keys(object) Returns an array containing the property names of the specified object (an associative array). The order of the returned array is undefined.

continuous.domain([domain]) If domain is specified, sets the scale’s domain to the specified array of numbers. The array must contain two or more elements. If the elements in the given array are not numbers, they will be coerced to numbers. If domain is not specified, returns a copy of the scale’s current domain. Although continuous scales typically have two values each in their domain and range, specifying more than two values produces a piecewise scale. For example, to create a diverging c

selection.insert(type, before) If the specified type is a string, inserts a new element of this type (tag name) before the element matching the specified before selector for each selected element. For example, a before selector :first-child will prepend nodes before the first child. Both type and before may instead be specified as functions which are evaluated for each selected element, in order, being passed the current datum (d), the current index (i), and the current group (nodes), with t

queue.awaitAll(callback) Sets the callback to be invoked when all deferred tasks have finished. The first argument to the callback is the first error that occurred, or null if no error occurred. If an error occurred, there are no additional arguments to the callback. Otherwise, the callback is also passed an array of results as the second argument. For example: d3.queue() .defer(fs.stat, __dirname + "/../Makefile") .defer(fs.stat, __dirname + "/../package.json") .awaitAll(functio

quantize.invertExtent(value) Returns the extent of values in the domain [x0, x1] for the corresponding value in the range: the inverse of quantize. This method is useful for interaction, say to determine the value in the domain that corresponds to the pixel location under the mouse. var width = d3.scaleQuantize() .domain([10, 100]) .range([1, 2, 4]); width.invertExtent(2); // [40, 70]

transition.attr(name, value) For each selected element, assigns the attribute tween for the attribute with the specified name to the specified target value. The starting value of the tween is the attribute’s value when the transition starts. The target value may be specified either as a constant or a function. If a function, it is immediately 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. If the t

quadtree.visit(callback) Visits each node in the quadtree in pre-order traversal, invoking the specified callback with arguments node, x0, y0, x1, y1 for each node, where node is the node being visited, ⟨x0, y0⟩ are the lower bounds of the node, and ⟨x1, y1⟩ are the upper bounds, and returns the quadtree. (Assuming that positive x is right and positive y is down, as is typically the case in Canvas and SVG, ⟨x0, y0⟩ is the top-left corner and ⟨x1, y1⟩ is the lower-right corner; however, the c

simulation.stop() Stops the simulation’s internal timer, if it is running, and returns the simulation. If the timer is already stopped, this method does nothing. This method is useful for running the simulation manually; see simulation.tick.

d3.geoPath([projection[, context]]) Creates a new geographic path generator with the default settings. If projection is specified, sets the current projection. If context is specified, sets the current context.