Package org.apache.commons.math4.transform

Interface ComplexTransform

All Superinterfaces:

Function<org.apache.commons.numbers.complex.Complex[],org.apache.commons.numbers.complex.Complex[]>, UnaryOperator<org.apache.commons.numbers.complex.Complex[]>

All Known Implementing Classes:

FastFourierTransform

public interface ComplexTransform
extends UnaryOperator<org.apache.commons.numbers.complex.Complex[]>

Complex transform.

Such transforms include sine transform, cosine transform or Hadamard transform.

Method Summary

Modifier and Type	Method	Description
org.apache.commons.numbers.complex.Complex[]	apply(double[] f)	Returns the transform of the specified data set.
default org.apache.commons.numbers.complex.Complex[]	apply(DoubleUnaryOperator f, double min, double max, int n)	Returns the transform of the specified function.
org.apache.commons.numbers.complex.Complex[]	apply(org.apache.commons.numbers.complex.Complex[] f)	Returns the transform of the specified data set.

Methods inherited from interface java.util.function.Function

andThen, compose

Method Detail

apply

org.apache.commons.numbers.complex.Complex[] apply(org.apache.commons.numbers.complex.Complex[] f)

Returns the transform of the specified data set.

Specified by:

apply in interface Function<org.apache.commons.numbers.complex.Complex[],org.apache.commons.numbers.complex.Complex[]>

Parameters:

f - the data array to be transformed (signal).

Returns:

the transformed array (spectrum).

Throws:

IllegalArgumentException - if the transform cannot be performed.

apply

org.apache.commons.numbers.complex.Complex[] apply(double[] f)

Returns the transform of the specified data set.

Parameters:

f - the data array to be transformed (signal).

Returns:

the transformed array (spectrum).

Throws:

IllegalArgumentException - if the transform cannot be performed.

apply

default org.apache.commons.numbers.complex.Complex[] 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.