Package org.das2.math.fft

Classes for performing generalized FFT transformations.

See:
Description

Interface Summary

ComplexArray.Double	ComplexArray that is accessed by doubles
ComplexArray.Float	A complex array that is accessed by floats

Class Summary

ComplexArray	Interface for passing complex arrays to and from FFT routines.
ComplexArray.ComplexArrayDoubleDouble	Implements ComplexArray that is backed by two float arrays.
ComplexArray.ComplexArrayFloatFloat	Implements ComplexArray that is backed by two float arrays.
FFTUtil
GeneralFFT	Provides forward and reverse FFT methods for any number of elements.
SimpleFFT
WaveformToSpectrum
WindowTableDataSet

Package org.das2.math.fft Description

Classes for performing generalized FFT transformations. These codes are based on the jnt.FFT package from NIST, with the interface changed so that data copies can be avoided and to improve useability. (The NIST package had implicit specifications about how to load arrays, and instead we use the ComplexArray interface.) Also classes are provided for common fft operations, such as transforming a waveform into a spectrogram.