CostFunction (thomasjungblut-common 2.0.0 API)

All Known Implementing Classes:

AbstractMiniBatchCostFunction, ConditionalLikelihoodCostFunction, LogisticRegressionCostFunction, MultilayerPerceptronCostFunction, NegatedCostFunction, RBMCostFunction
```
public interface CostFunction
```
Cost function interface to be implemented when using with a optimizer like conjugate gradient for example.

Author:

thomas.jungblut

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`CostGradientTuple`	`evaluateCost(de.jungblut.math.DoubleVector input)`	Evaluation for the cost function to retrieve cost and gradient.

- Method Detail
  - evaluateCost
```
CostGradientTuple evaluateCost(de.jungblut.math.DoubleVector input)
```
    Evaluation for the cost function to retrieve cost and gradient.
    
    Parameters:
    
    input - a given input vector
    
    Returns:
    
    a tuple consists of J (cost) and a vector X which is the gradient of the input.