interval.count(start, end) Returns the number of interval boundaries after start (exclusive) and before or equal to end (inclusive). Note that this behavior is slightly different than interval.range because its purpose is to return the zero-based number of the specified end date relative to the specified start date. For example, to compute the current zero-based day-of-year number: var now = new Date; d3.timeDay.count(d3.timeYear(now), now); // 177 Likewise, to compute the current zero-based

d3.geoTransverseMercator() d3.geoTransverseMercatorRaw The transverse spherical Mercator projection; see d3-geo.

d3.geoSinuMollweide() d3.geoSinuMollweideRaw Allen K. Philbrick’s Sinu-Mollweide projection. See also the interrupted form.

d3.interpolateDate(a, b) Returns an interpolator between the two dates a and b. Note: no defensive copy of the returned date is created; the same Date instance is returned for every evaluation of the interpolator. No copy is made for performance reasons; interpolators are often part of the inner loop of animated transitions.

d3.interpolateRgbBasis(colors) Returns a uniform nonrational B-spline interpolator through the specified array of colors, which are converted to RGB color space. Implicit control points are generated such that the interpolator returns colors[0] at t = 0 and colors[colors.length - 1] at t = 1. Opacity interpolation is not currently supported. See also d3.interpolateBasis, and see d3-scale-chromatic for examples.

request.password([value]) If value is specified, sets the password for authentication to the specified string and returns this request instance. If value is not specified, returns the current password, which defaults to null.

transform.invert(point) Returns the inverse transformation of the specified point which is a two-element array of numbers [x, y]. The returned point is equal to [(x - tx) / k, (y - ty) / k].

d3.interpolateTransformSvg(a, b) Returns an interpolator between the two 2D SVG transforms represented by a and b. Each transform is decomposed to a standard representation of translate, rotate, x-skew and scale; these component transformations are then interpolated. This behavior is standardized by CSS: see matrix decomposition for animation.

pow.tickFormat([count[, specifier]]) See continuous.tickFormat.

radialArea.angle([angle]) Equivalent to area.x, except the accessor returns the angle in radians, with 0 at -y (12 o’clock).