org.das2.math.fft.GeneralFFT

Provides forward and reverse FFT methods for any number of elements. The FFTs are implemented using a modified version of the jnt.FFT package from NIST. This version operates on ComplexArray objects that may be backed by das2 data sets avoiding unnecessary copies.

invTransform

invTransform( org.das2.math.fft.ComplexArray.Double data ) → void

perform the inverse transform on the array in situ.

Returns:

void (returns nothing)

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newDoubleFFT

newDoubleFFT( int n ) → GeneralFFT

creates an FFT object that operates on a ComplexArray.Double of n elements.

Returns:

org.das2.math.fft.GeneralFFT

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newFloatFFT

newFloatFFT( int n ) → GeneralFFT

creates an FFT object that operates on a ComplexArray.Float of n elements.

Returns:

org.das2.math.fft.GeneralFFT

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