d3.treemapDice(node, x0, y0, x1, y1) Divides the rectangular area specified by x0, y0, x1, y1 horizontally according the value of each of the specified node’s children. The children are positioned in order, starting with the left edge (x0) of the given rectangle. If the sum of the children’s values is less than the specified node’s value (i.e., if the specified node has a non-zero internal value), the remaining empty space will be positioned on the right edge (x1) of the given rectangle.

stack.keys([keys]) If keys is specified, sets the keys accessor to the specified function or array and returns this stack generator. If keys is not specified, returns the current keys accessor, which defaults to the empty array. A series (layer) is generated for each key. Keys are typically strings, but they may be arbitrary values. The series’ key is passed to the value accessor, along with each data point, to compute the point’s value.

pow.ticks([count]) See continuous.ticks.

d3.treemapResquarify(node, x0, y0, x1, y1) Like d3.treemapSquarify, except preserves the topology (node adjacencies) of the previous layout computed by d3.treemapResquarify, if there is one and it used the same target aspect ratio. This tiling method is good for animating changes to treemaps because it only changes node sizes and not their relative positions, thus avoiding distracting shuffling and occlusion. The downside of a stable update, however, is a suboptimal layout for subsequent upda

nest.map(array) Applies the nest operator to the specified array, returning a nested map. Each entry in the returned map corresponds to a distinct key value returned by the first key function. The entry value depends on the number of registered key functions: if there is an additional key, the value is another map; otherwise, the value is the array of elements filtered from the input array that have the given key value. If no keys are defined, returns the input array.

ribbon.target([target]) If target is specified, sets the target accessor to the specified function and returns this ribbon generator. If target is not specified, returns the current target accessor, which defaults to: function target(d) { return d.target; }

d3.geoBerghaus() d3.geoBerghausRaw(lobes) Berghaus’ star projection. The default center assumes the default lobe number of 5 and should be changed if a different number of lobes is used. Note: requires clipping to the sphere.

d3.axisLeft(scale) Constructs a new left-oriented axis generator for the given scale, with empty tick arguments, a tick size of 6 and padding of 3. In this orientation, ticks are drawn to the left of the vertical domain path.

map.each(function) Calls the specified function for each entry in this map, passing the entry’s value and key as arguments, followed by the map itself. Returns undefined. The iteration order is arbitrary.

axis.tickSizeOuter([size]) If size is specified, sets the outer tick size to the specified value and returns the axis. If size is not specified, returns the current outer tick size, which defaults to 6. The outer tick size controls the length of the square ends of the domain path, offset from the native position of the axis. Thus, the “outer ticks” are not actually ticks but part of the domain path, and their position is determined by the associated scale’s domain extent. Thus, outer ticks m