d3.format(specifier) An alias for locale.format on the default locale.

d3.geoPolyhedralButterfly() The gnomonic butterfly projection.

simulation.velocityDecay([decay]) If decay is specified, sets the velocity decay factor to the specified number in the range [0,1] and returns this simulation. If decay is not specified, returns the current velocity decay factor, which defaults to 0.4. The decay factor is akin to atmospheric friction; after the application of any forces during a tick, each node’s velocity is multiplied by 1 - decay. As with lowering the alpha decay rate, less velocity decay may converge on a better solution,

map.remove(key) If the map has an entry for the specified key string, removes the entry and returns true. Otherwise, this method does nothing and returns false.

graticule.extentMajor([extent]) If extent is specified, sets the major extent of this graticule. If extent is not specified, returns the current major extent, which defaults to ⟨⟨-180°, -90° + ε⟩, ⟨180°, 90° - ε⟩⟩.

d3.curveLinear(context) Produces a polyline through the specified points.

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

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.

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

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.