BackTrackLineSearch (Mallet 2 API)

java.lang.Object
- cc.mallet.optimize.BackTrackLineSearch

All Implemented Interfaces:: LineOptimizer.ByGradient

public class BackTrackLineSearch
extends java.lang.Object
implements LineOptimizer.ByGradient

Constructor Summary

Constructors
Constructor Description

BackTrackLineSearch(Optimizable.ByGradientValue optimizable)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`optimize(double[] line, double initialStep)`	Returns the last step size used.
`void`	`setAbsTolx(double tolx)`	Sets the tolerance of absolute diff in function value.
`void`	`setRelTolx(double tolx)`	Sets the tolerance of relative diff in function value.

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

- Constructor Detail
  - BackTrackLineSearch
```
public BackTrackLineSearch(Optimizable.ByGradientValue optimizable)
```
- Method Detail
  - setRelTolx
```
public void setRelTolx(double tolx)
```
    Sets the tolerance of relative diff in function value. Line search converges if abs(delta x / x) < tolx for all coordinates.
  - setAbsTolx
```
public void setAbsTolx(double tolx)
```
    Sets the tolerance of absolute diff in function value. Line search converges if abs(delta x) < tolx for all coordinates.
  - optimize
```
public double optimize(double[] line,
                       double initialStep)
```
    Description copied from interface: LineOptimizer.ByGradient
    
    Returns the last step size used.
    
    Specified by:
    
    optimize in interface LineOptimizer.ByGradient