ScalePow<Y> class final Pow scales

Power (“pow”) scales are similar to linear scales, except an exponential transform is applied to the input domain value before the output range value is computed.

Each range value y can be expressed as a function of the domain value x: y = mx^k + b, where k is the exponent value. Power scales also support negative domain values, in which case the input value and the resulting output value are multiplied by -1.

Implemented types

• Scale<X, Y>

Constructors

ScalePow.new({List<num> domain = const [0, 1], required List<Y> range, required Interpolate<Y> interpolate})

Constructs a new pow scale with the specified domain, range and interpolate, the exponent 1, and clamping disabled.

ScalePow.sqrt({List<num> domain = const [0, 1], required List<Y> range, required Interpolate<Y> interpolate})

Constructs a new pow scale with the specified domain, range and interpolate, the exponent 0.5, and clamping disabled.

Properties

clamp ↔ bool

Whether or not the scale currently clamps values to within the range.

getter/setter pair, inherited

domain ↔ List<num>

The scale's domain that specifies the input values.

getter/setter pair, inherited

exponent ↔ num

The scale's exponent.

getter/setter pair, inherited

hashCode → int

The hash code for this object.

no setter, inherited

interpolate ↔ Interpolate<Y>

The scale’s range interpolator factory.

getter/setter pair, inherited

range ↔ List<Y>

The scale's range that specifies the output values.

getter/setter pair, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

unknown ↔ Y?

The output value of the scale for null (or double.nan) input values.

getter/setter pair, inherited

Methods

call(num? x) → Y?

Given a value from the domain, returns the corresponding value from the range.

inherited

copy() → ScalePow<Y>

Returns an exact copy of this scale.

override

nice([num count = 10]) → void

Extends the domain so that it starts and ends on nice round values.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

tickFormat([num count = 10, String? specifier]) → String Function(num)

Returns a number format function suitable for displaying a tick value, automatically computing the appropriate precision based on the fixed interval between tick values.

inherited

ticks([num count = 10]) → List<num>

Returns approximately count representative values from the scale’s domain.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

dynamic({List<num> domain = const [0, 1], List<Object?> range = const <num>[0, 1], Interpolate<Object?> interpolate = interpolate}) → ScalePow<Object?>

number({List<num> domain = const [0, 1], List<num> range = const [0, 1], Interpolate<num> interpolate = interpolateNumber}) → ScalePow<num>