RealTransformer (Apache Commons Math 3.6.1 API)

All Known Implementing Classes:

FastCosineTransformer, FastHadamardTransformer, FastSineTransformer
```
public interface RealTransformer
```
Interface for one-dimensional data sets transformations producing real results.
Such transforms include sine transform, cosine transform or Hadamard transform. Fourier transform is of a different kind and does not implement this interface since it produces Complex results instead of real ones.

Since:

2.0

Method Summary

Methods
Modifier and Type	Method and Description
`double[]`	`transform(double[] f, TransformType type)` Returns the (forward, inverse) transform of the specified real data set.
`double[]`	`transform(UnivariateFunction f, double min, double max, int n, TransformType type)` Returns the (forward, inverse) transform of the specified real function, sampled on the specified interval.

- Method Detail
  - transform
```
double[] transform(double[] f,
                 TransformType type)
                   throws MathIllegalArgumentException
```
    Returns the (forward, inverse) transform of the specified real data set.
    
    Parameters:
    f - the real data array to be transformed (signal)
    type - the type of transform (forward, inverse) to be performed
    
    Returns:
    the real transformed array (spectrum)
    
    Throws:
    
    MathIllegalArgumentException - if the array cannot be transformed with the given type (this may be for example due to array size, which is constrained in some transforms)
  - transform
```
double[] transform(UnivariateFunction f,
                 double min,
                 double max,
                 int n,
                 TransformType type)
                   throws NonMonotonicSequenceException,
                          NotStrictlyPositiveException,
                          MathIllegalArgumentException
```
    Returns the (forward, inverse) transform of the specified real function, sampled on the specified interval.
    
    Parameters:
    f - the function to be sampled and transformed
    min - the (inclusive) lower bound for the interval
    max - the (exclusive) upper bound for the interval
    n - the number of sample points
    type - the type of transform (forward, inverse) to be performed
    
    Returns:
    the real transformed array
    
    Throws:
    
    NonMonotonicSequenceException - if the lower bound is greater than, or equal to the upper bound
    
    NotStrictlyPositiveException - if the number of sample points is negative
    
    MathIllegalArgumentException - if the sample cannot be transformed with the given type (this may be for example due to sample size, which is constrained in some transforms)

Interface RealTransformer

Method Summary

Method Detail

transform

transform