MEMTools.DualFunction

java.lang.Object
- de.jstacs.algorithms.optimization.DifferentiableFunction
- - de.jstacs.sequenceScores.statisticalModels.trainable.discrete.inhomogeneous.MEMTools.DualFunction

All Implemented Interfaces:

Function

Enclosing class:

MEMTools
```
public static class MEMTools.DualFunction
extends DifferentiableFunction
```
The dual function to the constraint problem of learning MEM's.

Author:

Jens Keilwagen

Constructor Summary

Constructors
Constructor and Description

DualFunction(SequenceIterator it, MEMConstraint[] constraints)
The constructor of a dual function.

Constructors
Constructor and Description
`DualFunction(SequenceIterator it, MEMConstraint[] constraints)` The constructor of a dual function.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`double`	`evaluateFunction(double[] x)` Evaluates the function at a certain vector (in mathematical sense) `x`.
`double[]`	`evaluateGradientOfFunction(double[] x)` Evaluates the gradient of a function at a certain vector (in mathematical sense) `x`, i.e., $\nabla f(\underline{x}) = \left(\frac{\partial f(\underline{x})}{\partial x_1},\ldots,\frac{\partial f(\underline{x})}{\partial x_n}\right)$ .
`int`	`getDimensionOfScope()` Returns the dimension of the scope of the `Function`.
`void`	`setValues(double[] x)` This method set the values of the Lagrange multiplicators of the constraints

Methods inherited from class de.jstacs.algorithms.optimization.DifferentiableFunction
findOneDimensionalMin

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

- Constructor Detail
  - DualFunction
```
public DualFunction(SequenceIterator it,
                    MEMConstraint[] constraints)
```
    The constructor of a dual function.
    
    Parameters:
    
    it - the correct initialized SequenceIterator
    
    constraints - the constraints used in this MEMTools.DualFunction
    
    Throws:
    
    IllegalArgumentException - if the constraints are not correct
- Method Detail
  - evaluateFunction
```
public double evaluateFunction(double[] x)
                        throws DimensionException
```
    Description copied from interface: Function
    
    Evaluates the function at a certain vector (in mathematical sense) x.
    
    Parameters:
    
    x - the current vector
    
    Returns:
    
    the evaluation of the function
    
    Throws:
    
    DimensionException - if dim(x) != n, with $f: \mathbb{R}^n \to \mathbb{R}$
  - evaluateGradientOfFunction
```
public double[] evaluateGradientOfFunction(double[] x)
                                    throws DimensionException
```
    Description copied from class: DifferentiableFunction
    
    Evaluates the gradient of a function at a certain vector (in mathematical sense) x, i.e., $\nabla f(\underline{x}) = \left(\frac{\partial f(\underline{x})}{\partial x_1},\ldots,\frac{\partial f(\underline{x})}{\partial x_n}\right)$ .
    
    Specified by:
    
    evaluateGradientOfFunction in class DifferentiableFunction
    
    Parameters:
    
    x - the current vector
    
    Returns:
    
    the evaluation of the gradient of a function, has dimension Function.getDimensionOfScope()
    
    Throws:
    
    DimensionException - if dim(x) != n, with $f: \mathbb{R}^n \to \mathbb{R}$
    
    See Also:
    
    Function.getDimensionOfScope()
  - getDimensionOfScope
```
public int getDimensionOfScope()
```
    Description copied from interface: Function
    
    Returns the dimension of the scope of the Function.
    
    Returns:
    
    the dimension of the scope: n with $f: \mathbb{R}^n \to \mathbb{R}$
  - setValues
```
public void setValues(double[] x)
```
    This method set the values of the Lagrange multiplicators of the constraints
    
    Parameters:
    
    x - the new values

Class MEMTools.DualFunction

Constructor Summary

Method Summary

Methods inherited from class de.jstacs.algorithms.optimization.DifferentiableFunction

Methods inherited from class java.lang.Object

Constructor Detail

DualFunction

Method Detail

evaluateFunction

evaluateGradientOfFunction

getDimensionOfScope

setValues