Function (Apache OpenNLP Tools 2.1.1 API)

All Known Implementing Classes:

NegLogLikelihood, ParallelNegLogLikelihood, QNMinimizer.L2RegFunction
```
public interface Function
```
Interface for a function.

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  int getDimension()
  
  double[] gradientAt(double[] x)
  
  double valueAt(double[] x)

Method Detail

getDimension
```
int getDimension()
```

valueAt
```
double valueAt(double[] x)
```

gradientAt
```
double[] gradientAt(double[] x)
```