d3.tsvFormat(rows[, columns]) Equivalent to dsvFormat("\t").format.

d3.tickStep(start, stop, count) Returns the difference between adjacent tick values if the same arguments were passed to ticks: a nicely-rounded value that is a power of ten multiplied by 1, 2 or 5. Note that due to the limited precision of IEEE 754 floating point, the returned value may not be exact decimals; use d3-format to format numbers for human consumption.

d3.pack() Creates a new pack layout with the default settings.

rotation(point) Returns a new array [longitude, latitude] in degrees representing the rotated point of the given point. The point must be specified as a two-element array [longitude, latitude] in degrees.

csv2json [options…] [file] Equivalent to dsv2json.

quadtree.find(x, y[, radius]) Returns the datum closest to the position ⟨x,y⟩ with the given search radius. If radius is not specified, it defaults to infinity. If there is no datum within the search area, returns undefined.

d3.polygonCentroid(polygon) <> Returns the centroid of the specified polygon.

project(lambda, phi) Projects the specified point [lambda, phi] in radians, returning a new point [x, y] in unitless coordinates.

d3.geoGraticule() Constructs a feature generator for creating graticules: a uniform grid of meridians and parallels for showing projection distortion. The default graticule has meridians and parallels every 10° between ±80° latitude; for the polar regions, there are meridians every 90°.

collide.iterations([iterations]) If iterations is specified, sets the number of iterations per application to the specified number and returns this force. If iterations is not specified, returns the current iteration count which defaults to 1. Increasing the number of iterations greatly increases the rigidity of the constraint and avoids partial overlap of nodes, but also increases the runtime cost to evaluate the force.