d3.interpolateYlGnBu(t) d3.schemeYlGnBu Given a number t in the range [0,1], returns the corresponding color from the “YlGnBu” sequential color scheme represented as an RGB string.

d3.area() Constructs a new area generator with the default settings.

d3.deviation(array[, accessor]) Returns the standard deviation, defined as the square root of the bias-corrected variance, of the given array of numbers. If the array has fewer than two values, returns undefined. An optional accessor function may be specified, which is equivalent to calling array.map(accessor) before computing the standard deviation. This method ignores undefined and NaN values; this is useful for ignoring missing data.

d3.scalePow() Constructs a new continuous scale with the unit domain [0, 1], the unit range [0, 1], the exponent 1, the default interpolator and clamping disabled. (Note that this is effectively a linear scale until you set a different exponent.)

transition.call(function[, arguments…]) Invokes the specified function exactly once, passing in this transition along with any optional arguments. Returns this transition. This is equivalent to invoking the function by hand but facilitates method chaining. For example, to set several attributes in a reusable function: function color(transition, fill, stroke) { transition .style("fill", fill) .style("stroke", stroke); } Now say: d3.selectAll("div").transition().call(color, "red"

log.copy() See continuous.copy.

selection.merge(other) Returns a new selection merging this selection with the specified other selection. The returned selection has the same number of groups and the same parents as this selection. Any missing (null) elements in this selection are filled with the corresponding element, if present (not null), from the specified selection. (If the other selection has additional groups or parents, they are ignored.) This method is commonly used to merge the enter and update selections after a

selection.remove() Removes the selected elements from the document. Returns this selection (the removed elements) which are now detached from the DOM. There is not currently a dedicated API to add removed elements back to the document; however, you can pass a function to selection.append or selection.insert to re-add elements.

d3.interpolateBuGn(t) d3.schemeBuGn Given a number t in the range [0,1], returns the corresponding color from the “BuGn” sequential color scheme represented as an RGB string.

d3.radialArea() Constructs a new radial area generator with the default settings. A radial area generator is equivalent to the standard Cartesian area generator, except the x and y accessors are replaced with angle and radius accessors. Radial areas are always positioned relative to ⟨0,0⟩; use a transform (see: SVG, Canvas) to change the origin.