RandomGenerator class

Random number generator with various distributions.

Constructors

RandomGenerator([int? seed])

Creates a random generator with an optional seed.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

autocorrelatedNoise(int count, double correlation, {double stdDev = 1}) → List<double>

Generates autocorrelated noise.

beta(double alpha, double betaParam) → double

Generates a random value from a beta distribution.

binomial(int n, double p) → int

Generates a random value from a binomial distribution.

boolean([double probability = 0.5]) → bool

Generates a random boolean with the given probability of being true.

brownianMotion(int steps, {double start = 100, double mu = 0.0001, double sigma = 0.02, double dt = 1}) → List<double>

Generates Brownian motion (geometric random walk).

choice<T>(List<T> items) → T

Selects a random element from a list.

exponential(double lambda) → double

Generates a random value from an exponential distribution.

gamma(double shape, [double scale = 1.0]) → double

Generates a random value from a gamma distribution.

logNormal(double mean, double stdDev) → double

Generates a random value from a log-normal distribution.

normal(double mean, double stdDev) → double

Generates a random value from a normal (Gaussian) distribution.

normalList(int count, double mean, double stdDev) → List<double>

Generates a list of random values from a normal distribution.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

pareto(double alpha, [double xMin = 1.0]) → double

Generates a random value from a Pareto distribution.

poisson(double lambda) → int

Generates a random value from a Poisson distribution.

randomColor({int? alpha}) → int

Generates a random color.

randomWalk(int steps, {double start = 0, double stepSize = 1}) → List<double>

Generates a random walk.

randomWalkWithDrift(int steps, {double start = 0, double drift = 0, double volatility = 1}) → List<double>

Generates a random walk with drift.

sample<T>(List<T> items, int n) → List<T>

Samples n items from a list without replacement.

shuffle<T>(List<T> items) → List<T>

Shuffles a list in place and returns it.

toString() → String

A string representation of this object.

inherited

triangular(double min, double max, double mode) → double

Generates a random value from a triangular distribution.

uniform(double min, double max) → double

Generates a random double between min and max.

uniformInt(int min, int max) → int

Generates a random integer between min (inclusive) and max (exclusive).

uniformList(int count, double min, double max) → List<double>

Generates a list of random values from a uniform distribution.

uuid() → String

Generates a random UUID.

weibull(double shape, double scale) → double

Generates a random value from a Weibull distribution.

weightedChoice<T>(List<T> items, List<double> weights) → T

Selects a random element from a list with weights.

Operators

operator ==(Object other) → bool

The equality operator.

inherited