ScaleQuantile<Y> class
final
Quantile scales
Quantile scales map a sampled input domain to a discrete range.
The domain is considered continuous and thus the scale will accept any
reasonable input value; however, the domain is specified as a discrete set
of sample values. The number of values in (the cardinality of) the output
range determines the number of quantiles that will be computed from the
domain. To compute the quantiles, the domain is sorted, and treated as a
population of discrete values;
see quantile. See
this quantile choropleth
for an example.
Constructors
-
ScaleQuantile.new({required List<
num?> domain, required List<Y> range}) -
Constructs a new quantile scale with the specified
domainandrange.
Properties
-
domain
↔ List<
num> -
The scale's domain that specifies the input values.
getter/setter pairoverride
- hashCode → int
-
The hash code for this object.
no setterinherited
-
quantiles
→ List<
num> -
Returns the quantile thresholds.
no setter
-
range
↔ List<
Y> -
The scale's range that specifies the output values.
getter/setter pairoverride
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- unknown ↔ Y?
-
getter/setter pair
Methods
-
call(
num? x) → Y? -
Given a value in the input domain, returns the corresponding value in
the output range.
override
-
copy(
) → ScaleQuantile< Y> -
Returns an exact copy of this scale.
override
-
invertExtent(
Y y) → (num, num) - Returns the extent of values in the domain (x0, x1) for the corresponding value in the range: the inverse of call.
-
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