RealTransform (Apache Commons Math 4.0-beta1)

All Superinterfaces:

Function<double[],double[]>, UnaryOperator<double[]>

All Known Implementing Classes:

FastCosineTransform, FastHadamardTransform, FastSineTransform
```
public interface RealTransform
extends UnaryOperator<double[]>
```
Real transforms.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`double[]`	`apply(double[] f)`	Returns the transform of the specified data set.
`default double[]`	`apply(DoubleUnaryOperator f, double min, double max, int n)`	Returns the transform of the specified function.

Methods inherited from interface java.util.function.Function
andThen, compose

- Method Detail
  - apply
```
double[] apply(double[] f)
```
    Returns the transform of the specified data set.
    
    Specified by:
    
    apply in interface Function<double[],double[]>
    
    Parameters:
    
    f - the data array to be transformed (signal).
    
    Returns:
    
    the transformed array (spectrum).
    
    Throws:
    
    IllegalArgumentException - if the transform cannot be performed.
  - apply
```
default double[] apply(DoubleUnaryOperator f,
                       double min,
                       double max,
                       int n)
```
    Returns the transform of the specified function.
    
    Parameters:
    
    f - Function to be sampled and transformed.
    
    min - Lower bound (inclusive) of the interval.
    
    max - Upper bound (exclusive) of the interval.
    
    n - Number of sample points.
    
    Returns:
    
    the result.
    
    Throws:
    
    IllegalArgumentException - if the transform cannot be performed.