QuadraticFunction

java.lang.Object

Functions.QuadraticFunction

All Implemented Interfaces:: Function

public class QuadraticFunction
extends java.lang.Object
implements Function

Class for representation of quadratic function of R^n

Field Summary

Fields
Modifier and Type	Field	Description
`(package private) double[][]`	`A`	Matrix of square terms.
`(package private) double[]`	`B`	Vector of one-dimensional terms
`(package private) double`	`C`	Constant of function

Constructor Summary

Constructors

Constructor Description

QuadraticFunction(double[][] a, double[] b, double c)
Standard constructor of matrix representation of function

Method Summary

Modifier and Type	Method	Description
`double[]`	`multiply(double[] x)`	function that compute (A * x)
`double`	`run(double[] x)`	Compute the function meaning in the point given like vector
`double[]`	`runGradient(double[] x)`	Compute gradient of the function in given point

Methods inherited from class java.lang.Object

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

Field Details
- A
  
  final double[][] A
  
  Matrix of square terms. A_{ij}=A_{ji}, A_{ii} = 2 * x{i}^2
- B
  
  final double[] B
  
  Vector of one-dimensional terms
- C
  
  final double C
  
  Constant of function
Constructor Details
- QuadraticFunction
  
  public QuadraticFunction(double[][] a, double[] b, double c)
  
  Standard constructor of matrix representation of function
  
  Parameters:
  
  a - A
  
  b - B
  
  c - C
Method Details
- run
  
  public double run(double[] x)
  
  Description copied from interface: Function
  
  Compute the function meaning in the point given like vector
  
  Specified by:
  
  run in interface Function
  
  Parameters:
  
  x - vector that represent point
  
  Returns:
  
  meaning of function like f(x)
- runGradient
  
  public double[] runGradient(double[] x)
  
  Description copied from interface: Function
  
  Compute gradient of the function in given point
  
  Specified by:
  
  runGradient in interface Function
  
  Parameters:
  
  x - vector that represent point
  
  Returns:
  
  vector that represent gradient of the function
- multiply
  
  public double[] multiply(double[] x)
  
  Description copied from interface: Function
  
  function that compute (A * x)
  
  Specified by:
  
  multiply in interface Function
  
  Parameters:
  
  x - point for multiply
  
  Returns:
  
  result of computing (A * x)