.Wavelet.General

Information

This section defines some general functions, which are common utilities for wavelet transformation and other functions.

Contents

Name	Description
_fft	An external function to carry out FFT
cumSum	Cumulative sum of a vector. Data type is Real.
cumSumInt	Cumulative sum of a vector. Data type is Integer
diff	Difference between every two adjacent elements of a vector
fft	Fast Fourier transform
fftShift	Shift zero-frequency component to center of spectrum
findIndex	Find the location of a value in a monotone vector
filterBank	Get the four wavelet filters based on a given scaling filter
ifft	Inverse fast Fourier transform
innerProduct	Inner product of two same length vectors
interpL	One-dimensional linear interpolation
midVector	Extract the middle part of a vector
nStdIfft	Inverse non-standard 1-D fast Fourier transform
quadReverse	Quadrature mirror of a given vector
sinc	Sinc function
upsample	Up-sampling of a vector (insert a zero after every element except the last one)
wavConv	Fully convolving of a data vector and a filter vector for wavelet transform