polyrun.sampling

Class SphereWalk

java.lang.Object

polyrun.sampling.BallWalk

polyrun.sampling.SphereWalk

All Implemented Interfaces:

RandomWalk

public class SphereWalk
extends BallWalk

Sphere walk sampler.

Constructor Summary

Constructors

Constructor and Description
SphereWalk(double radius, OutOfBoundsBehaviour outOfBoundsBehaviour)
SphereWalk(Random random, double radius, OutOfBoundsBehaviour outOfBoundsBehaviour)
SphereWalk(Random random, double radius, OutOfBoundsBehaviour outOfBoundsBehaviour, double eps)

Method Summary

Modifier and Type	Method and Description
protected double	getStepLength(double r, int n)

Methods inherited from class polyrun.sampling.BallWalk

next

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SphereWalk

public SphereWalk(double radius,
                  OutOfBoundsBehaviour outOfBoundsBehaviour)

Parameters:

radius - radius of a sphere

outOfBoundsBehaviour - the behaviour of random walk when it tries to make a step that exceeds bounds of the polytope

SphereWalk

public SphereWalk(Random random,
                  double radius,
                  OutOfBoundsBehaviour outOfBoundsBehaviour)

Parameters:

random - random number generator

radius - radius of a sphere

outOfBoundsBehaviour - the behaviour of random walk when it tries to make a step that exceeds bounds of the polytope

SphereWalk

public SphereWalk(Random random,
                  double radius,
                  OutOfBoundsBehaviour outOfBoundsBehaviour,
                  double eps)

Parameters:

random - random number generator

radius - radius of a sphere

outOfBoundsBehaviour - the behaviour of random walk when it tries to make a step that exceeds bounds of the polytope

eps - absolute error to accept in floating point comparisons (non-negative, default 1e-10)

Method Detail

getStepLength

protected double getStepLength(double r,
                               int n)

Overrides:

getStepLength in class BallWalk

Parameters:

r - radius

n - number of dimensions

Returns:

length of the step