math

Documentation

Index

• func DCT(data []float64, width *int) error
• func FFT(ar, ai []float64, length int) error

Functions

func DCT

func DCT(data []float64, width *int) error

Discrete Cosine Transform

• Arguments - data : pointer to the real vector width : only the first "width" elements will be computed, if width <= 0, all elements will be computed and returned

func FFT

func FFT(ar, ai []float64, length int) error

------------------- Fast Fourier Transformation ------------------ routine of fft

• Arguments - ar : pointer to the sequence of the real part ai : pointer to the sequence of the imaginary part length : length of the vector, it must be 2^N, otherwise the vector must be padded with zero.