GradientDescentMethod

java.lang.Object

methods.AbstractGradientMethod

methods.GradientDescentMethod

All Implemented Interfaces:: Method

public class GradientDescentMethod
extends AbstractGradientMethod

предоставляет возможность искать минимум квадратичных функций методом градиентного спуска

Field Summary

Fields

Modifier and Type Field Description

private double step
step of Gradient method

Fields inherited from class methods.AbstractGradientMethod
epsilon, log, out

Constructor Summary

Constructors
Constructor	Description
`GradientDescentMethod(double step, double epsilon)`	Standard constructor
`GradientDescentMethod(double step, double epsilon, boolean log, java.lang.String fileName)`	Full constructor

Method Summary

Modifier and Type Method Description

double[] findMinimum(Function function, double[] x0)
search minimum of the function with start from the point in x_0

Methods inherited from class methods.AbstractGradientMethod
log

Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details
- step
  
  private double step
  
  step of Gradient method
Constructor Details
- GradientDescentMethod
  
  public GradientDescentMethod(double step, double epsilon, boolean log, java.lang.String fileName) throws java.io.FileNotFoundException
  
  Full constructor
  
  Parameters:
  
  step - step
  
  epsilon - AbstractGradientMethod.epsilon
  
  log - AbstractGradientMethod.log
  
  fileName - output file for AbstractGradientMethod.out
  
  Throws:
  
  java.io.FileNotFoundException - if specified output file was not found
  
  See Also:
  
  AbstractGradientMethod(double, boolean, String)
- GradientDescentMethod
  
  public GradientDescentMethod(double step, double epsilon)
  
  Standard constructor
  
  Parameters:
  
  step - step
  
  epsilon - AbstractGradientMethod.epsilon
  
  See Also:
  
  AbstractGradientMethod(double)
Method Details
- findMinimum
  
  public double[] findMinimum(Function function, double[] x0) throws java.io.IOException
  
  Description copied from interface: Method
  
  search minimum of the function with start from the point in x_0
  
  Parameters:
  
  function - explores function
  
  x0 - point for the start of exploring
  
  Returns:
  
  minimum of the function
  
  Throws:
  
  java.io.IOException - exception when log from function computing throw exception