Class NelderMeadSimplex
- java.lang.Object
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- org.apache.commons.math3.optimization.direct.AbstractSimplex
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- org.apache.commons.math3.optimization.direct.NelderMeadSimplex
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- All Implemented Interfaces:
OptimizationData
@Deprecated public class NelderMeadSimplex extends AbstractSimplex
Deprecated.As of 3.1 (to be removed in 4.0).This class implements the Nelder-Mead simplex algorithm.- Since:
- 3.0
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Field Summary
Fields Modifier and Type Field Description private static double
DEFAULT_GAMMA
Deprecated.Default value forgamma
: 0.5.private static double
DEFAULT_KHI
Deprecated.Default value forkhi
: 2.0.private static double
DEFAULT_RHO
Deprecated.Default value forrho
: 1.0.private static double
DEFAULT_SIGMA
Deprecated.Default value forsigma
: 0.5.private double
gamma
Deprecated.Contraction coefficient.private double
khi
Deprecated.Expansion coefficient.private double
rho
Deprecated.Reflection coefficient.private double
sigma
Deprecated.Shrinkage coefficient.
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Constructor Summary
Constructors Constructor Description NelderMeadSimplex(double[] steps)
Deprecated.Build a Nelder-Mead simplex with default coefficients.NelderMeadSimplex(double[][] referenceSimplex)
Deprecated.Build a Nelder-Mead simplex with default coefficients.NelderMeadSimplex(double[][] referenceSimplex, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.NelderMeadSimplex(double[] steps, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.NelderMeadSimplex(int n)
Deprecated.Build a Nelder-Mead simplex with default coefficients.NelderMeadSimplex(int n, double sideLength)
Deprecated.Build a Nelder-Mead simplex with default coefficients.NelderMeadSimplex(int n, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.NelderMeadSimplex(int n, double sideLength, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description void
iterate(MultivariateFunction evaluationFunction, java.util.Comparator<PointValuePair> comparator)
Deprecated.Compute the next simplex of the algorithm.-
Methods inherited from class org.apache.commons.math3.optimization.direct.AbstractSimplex
build, evaluate, getDimension, getPoint, getPoints, getSize, replaceWorstPoint, setPoint, setPoints
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Field Detail
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DEFAULT_RHO
private static final double DEFAULT_RHO
Deprecated.Default value forrho
: 1.0.- See Also:
- Constant Field Values
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DEFAULT_KHI
private static final double DEFAULT_KHI
Deprecated.Default value forkhi
: 2.0.- See Also:
- Constant Field Values
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DEFAULT_GAMMA
private static final double DEFAULT_GAMMA
Deprecated.Default value forgamma
: 0.5.- See Also:
- Constant Field Values
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DEFAULT_SIGMA
private static final double DEFAULT_SIGMA
Deprecated.Default value forsigma
: 0.5.- See Also:
- Constant Field Values
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rho
private final double rho
Deprecated.Reflection coefficient.
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khi
private final double khi
Deprecated.Expansion coefficient.
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gamma
private final double gamma
Deprecated.Contraction coefficient.
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sigma
private final double sigma
Deprecated.Shrinkage coefficient.
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Constructor Detail
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NelderMeadSimplex
public NelderMeadSimplex(int n)
Deprecated.Build a Nelder-Mead simplex with default coefficients. The default coefficients are 1.0 for rho, 2.0 for khi and 0.5 for both gamma and sigma.- Parameters:
n
- Dimension of the simplex.
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NelderMeadSimplex
public NelderMeadSimplex(int n, double sideLength)
Deprecated.Build a Nelder-Mead simplex with default coefficients. The default coefficients are 1.0 for rho, 2.0 for khi and 0.5 for both gamma and sigma.- Parameters:
n
- Dimension of the simplex.sideLength
- Length of the sides of the default (hypercube) simplex. SeeAbstractSimplex(int,double)
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NelderMeadSimplex
public NelderMeadSimplex(int n, double sideLength, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.- Parameters:
n
- Dimension of the simplex. SeeAbstractSimplex(int,double)
.sideLength
- Length of the sides of the default (hypercube) simplex. SeeAbstractSimplex(int,double)
.rho
- Reflection coefficient.khi
- Expansion coefficient.gamma
- Contraction coefficient.sigma
- Shrinkage coefficient.
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NelderMeadSimplex
public NelderMeadSimplex(int n, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.- Parameters:
n
- Dimension of the simplex. SeeAbstractSimplex(int)
.rho
- Reflection coefficient.khi
- Expansion coefficient.gamma
- Contraction coefficient.sigma
- Shrinkage coefficient.
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NelderMeadSimplex
public NelderMeadSimplex(double[] steps)
Deprecated.Build a Nelder-Mead simplex with default coefficients. The default coefficients are 1.0 for rho, 2.0 for khi and 0.5 for both gamma and sigma.- Parameters:
steps
- Steps along the canonical axes representing box edges. They may be negative but not zero. See
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NelderMeadSimplex
public NelderMeadSimplex(double[] steps, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.- Parameters:
steps
- Steps along the canonical axes representing box edges. They may be negative but not zero. SeeAbstractSimplex(double[])
.rho
- Reflection coefficient.khi
- Expansion coefficient.gamma
- Contraction coefficient.sigma
- Shrinkage coefficient.- Throws:
java.lang.IllegalArgumentException
- if one of the steps is zero.
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NelderMeadSimplex
public NelderMeadSimplex(double[][] referenceSimplex)
Deprecated.Build a Nelder-Mead simplex with default coefficients. The default coefficients are 1.0 for rho, 2.0 for khi and 0.5 for both gamma and sigma.- Parameters:
referenceSimplex
- Reference simplex. SeeAbstractSimplex(double[][])
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NelderMeadSimplex
public NelderMeadSimplex(double[][] referenceSimplex, double rho, double khi, double gamma, double sigma)
Deprecated.Build a Nelder-Mead simplex with specified coefficients.- Parameters:
referenceSimplex
- Reference simplex. SeeAbstractSimplex(double[][])
.rho
- Reflection coefficient.khi
- Expansion coefficient.gamma
- Contraction coefficient.sigma
- Shrinkage coefficient.- Throws:
NotStrictlyPositiveException
- if the reference simplex does not contain at least one point.DimensionMismatchException
- if there is a dimension mismatch in the reference simplex.
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Method Detail
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iterate
public void iterate(MultivariateFunction evaluationFunction, java.util.Comparator<PointValuePair> comparator)
Deprecated.Compute the next simplex of the algorithm.- Specified by:
iterate
in classAbstractSimplex
- Parameters:
evaluationFunction
- Evaluation function.comparator
- Comparator to use to sort simplex vertices from best to worst.
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