RiddersSolver (Hipparchus 1.4 API)

java.lang.Object
- org.hipparchus.analysis.solvers.BaseAbstractUnivariateSolver<UnivariateFunction>
- - org.hipparchus.analysis.solvers.AbstractUnivariateSolver
  - - org.hipparchus.analysis.solvers.RiddersSolver

All Implemented Interfaces:

BaseUnivariateSolver<UnivariateFunction>, UnivariateSolver
```
public class RiddersSolver
extends AbstractUnivariateSolver
```
Implements the Ridders' Method for root finding of real univariate functions. For reference, see C. Ridders, A new algorithm for computing a single root of a real continuous function , IEEE Transactions on Circuits and Systems, 26 (1979), 979 - 980.
The function should be continuous but not necessarily smooth.

Constructor Summary

Constructors
Constructor	Description
`RiddersSolver()`	Construct a solver with default accuracy (1e-6).
`RiddersSolver(double absoluteAccuracy)`	Construct a solver.
`RiddersSolver(double relativeAccuracy, double absoluteAccuracy)`	Construct a solver.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

protected double doSolve()
Method for implementing actual optimization algorithms in derived classes.
- Methods inherited from class org.hipparchus.analysis.solvers.BaseAbstractUnivariateSolver
  computeObjectiveValue, getAbsoluteAccuracy, getEvaluations, getFunctionValueAccuracy, getMax, getMaxEvaluations, getMin, getRelativeAccuracy, getStartValue, incrementEvaluationCount, isBracketing, isSequence, setup, solve, solve, solve, verifyBracketing, verifyInterval, verifySequence
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
- Methods inherited from interface org.hipparchus.analysis.solvers.BaseUnivariateSolver
  getAbsoluteAccuracy, getEvaluations, getFunctionValueAccuracy, getMaxEvaluations, getRelativeAccuracy, solve, solve, solve

- Constructor Detail
  - RiddersSolver
```
public RiddersSolver()
```
    Construct a solver with default accuracy (1e-6).
  - RiddersSolver
```
public RiddersSolver(double absoluteAccuracy)
```
    Construct a solver.
    
    Parameters:
    
    absoluteAccuracy - Absolute accuracy.
  - RiddersSolver
```
public RiddersSolver(double relativeAccuracy,
                     double absoluteAccuracy)
```
    Construct a solver.
    
    Parameters:
    
    relativeAccuracy - Relative accuracy.
    
    absoluteAccuracy - Absolute accuracy.
- Method Detail
  - doSolve
```
protected double doSolve()
                  throws MathIllegalArgumentException,
                         MathIllegalStateException
```
    Method for implementing actual optimization algorithms in derived classes.
    
    Specified by:
    
    doSolve in class BaseAbstractUnivariateSolver<UnivariateFunction>
    
    Returns:
    
    the root.
    
    Throws:
    
    MathIllegalArgumentException - if the initial search interval does not bracket a root and the solver requires it.
    
    MathIllegalStateException - if the maximal number of evaluations is exceeded.