OrthantWiseLimitedMemoryBFGS (Mallet 2 API)

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

All Implemented Interfaces:

Optimizer
```
public class OrthantWiseLimitedMemoryBFGS
extends java.lang.Object
implements Optimizer
```
Implementation of orthant-wise limited memory quasi Newton method for optimizing convex L1-regularized objectives. See: "Scalable training of l1-regularized log-linear models" by Galen Andrew and Jianfeng Gao in ICML 2007 for details. This code is an adaptation of the freely-available C++ code on Galen's webpage.

Author:

Kedar Bellare

Nested Class Summary
- Nested classes/interfaces inherited from interface cc.mallet.optimize.Optimizer
  Optimizer.ByBatches

Constructor Summary

Constructors
Constructor	Description
`OrthantWiseLimitedMemoryBFGS(Optimizable.ByGradientValue function)`
`OrthantWiseLimitedMemoryBFGS(Optimizable.ByGradientValue function, double l1wt)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`getIteration()`
`Optimizable`	`getOptimizable()`
`boolean`	`isConverged()`
`boolean`	`optimize()`
`boolean`	`optimize(int numIterations)`

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

Constructor Detail

OrthantWiseLimitedMemoryBFGS

public OrthantWiseLimitedMemoryBFGS(Optimizable.ByGradientValue function)

OrthantWiseLimitedMemoryBFGS

public OrthantWiseLimitedMemoryBFGS(Optimizable.ByGradientValue function,
                                    double l1wt)

Method Detail
- getOptimizable
```
public Optimizable getOptimizable()
```
  Specified by:
  
  getOptimizable in interface Optimizer
- isConverged
```
public boolean isConverged()
```
  Specified by:
  
  isConverged in interface Optimizer
- getIteration
```
public int getIteration()
```
- optimize
```
public boolean optimize()
```
  Specified by:
  
  optimize in interface Optimizer
- optimize
```
public boolean optimize(int numIterations)
```
  Specified by:
  
  optimize in interface Optimizer