request.send(method[, data][, callback]) Issues this request using the specified method (such as GET or POST), optionally posting the specified data in the request body, and returns this request instance. If a callback is specified, the callback will be invoked asynchronously when the request succeeds or fails. The callback is invoked with two arguments: the error, if any, and the response value. The response value is undefined if an error occurs. This is equivalent to: request .on("erro

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.

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

d3.touches(container[, touches]) Returns the x and y coordinates of the touches associated with the current event relative to the specified container. The container may be an HTML or SVG container element, such as a G element or an SVG element. The coordinates are returned as an array of two-element arrays of numbers [[x1, y1], [x2, y2], …]. If touches is not specified, it defaults to the current event’s touches property.

d3.permute(array, indexes) Returns a permutation of the specified array using the specified array of indexes. The returned array contains the corresponding element in array for each index in indexes, in order. For example, permute(["a", "b", "c"], [1, 2, 0]) returns ["b", "c", "a"]. It is acceptable for the array of indexes to be a different length from the array of elements, and for indexes to be duplicated or omitted. This method can also be used to extract the values from an object into an

d3.min(array[, accessor]) Returns the minimum value in the given array using natural order. If the array is empty, returns undefined. An optional accessor function may be specified, which is equivalent to calling array.map(accessor) before computing the minimum value. Unlike the built-in Math.min, this method ignores undefined, null and NaN values; this is useful for ignoring missing data. In addition, elements are compared using natural order rather than numeric order. For example, the minim