d3.symbolCircle The circle symbol type.

histogram.value([value]) If value is specified, sets the value accessor to the specified function or constant and returns this histogram generator. If value is not specified, returns the current value accessor, which defaults to the identity function. When a histogram is generated, the value accessor will be invoked for each element in the input data array, being passed the element d, the index i, and the array data as three arguments. The default value accessor assumes that the input data a

d3.max(array[, accessor]) Returns the maximum 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 maximum value. Unlike the built-in Math.max, this method ignores undefined values; this is useful for ignoring missing data. In addition, elements are compared using natural order rather than numeric order. For example, the maximum of ["20", "

d3.stackOrderInsideOut(series) Returns a series order such that the larger series (according to the sum of values) are on the inside and the smaller series are on the outside. This order is recommended for streamgraphs in conjunction with the wiggle offset. See Stacked Graphs—Geometry & Aesthetics by Bryon & Wattenberg for more information.

d3.sum(array[, accessor]) Returns the sum of the given array of numbers. If the array is empty, returns 0. An optional accessor function may be specified, which is equivalent to calling array.map(accessor) before computing the sum. This method ignores undefined and NaN values; this is useful for ignoring missing data.

stack.order([order]) If order is specified, sets the order accessor to the specified function or array and returns this stack generator. If order is not specified, returns the current order acccesor, which defaults to stackOrderNone; this uses the order given by the key accessor. See stack orders for the built-in orders. If order is a function, it is passed the generated series array and must return an array of numeric indexes representing the stack order. For example, the default order is d

zoom.translateBy(selection, x, y) If selection is a selection, translates the current zoom transform of the selected elements by x and y, such that the new tx1 = tx0 + k × x and ty1 = ty0 + k × y. If selection is a transition, defines a “zoom” tween translating the current transform. This method is a convenience method for zoom.transform. The x and y translation amounts may be specified either as numbers or as functions that returns numbers. If a function, it is invoked for each selected ele

sequential.interpolator([interpolator]) If interpolator is specified, sets the scale’s interpolator to the specified function. If interpolator is not specified, returns the scale’s current interpolator.

d3.interpolatePRGn(t) d3.schemePRGn Given a number t in the range [0,1], returns the corresponding color from the “PRGn” diverging color scheme represented as an RGB string.

stream.point(x, y[, z]) Indicates a point with the specified coordinates x and y (and optionally z). The coordinate system is unspecified and implementation-dependent; for example, projection streams require spherical coordinates in degrees as input. Outside the context of a polygon or line, a point indicates a point geometry object (Point or MultiPoint). Within a line or polygon ring, the point indicates a control point.