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% LTFAT - Basic Fourier and DCT analysis.
%
% Peter L. Søndergaard, 2008 - 2013.
%
% Support routines
% FFTINDEX - Index of positive and negative frequencies.
% MODCENT - Centered modulo operation.
% FLOOR23 - Previous number with only 2,3 factors
% FLOOR235 - Previous number with only 2,3,5 factors
% CEIL23 - Next number with only 2,3 factors
% CEIL235 - Next number with only 2,3,5 factors
% NEXTFASTFFT - Next efficient FFT size (2,3,5,7).
%
% Basic Fourier analysis
% DFT - Unitary discrete Fourier transform.
% IDFT - Inverse of |dft|.
% FFTREAL - FFT for real valued signals.
% IFFTREAL - Inverse of |fftreal|.
% GGA - Generalized Goertzel Algorithm.
% CHIRPZT - Chirped Z-transform.
% PLOTFFT - Plot FFT coefficients.
% PLOTFFTREAL - Plot |fftreal| coefficients.
%
% Simple operations on periodic functions
% INVOLUTE - Involution.
% PEVEN - Even part of periodic function.
% PODD - Odd part of periodic function.
% PCONV - Periodic convolution.
% CONVOLVE - Fast, non-periodic convolution.
% PXCORR - Periodic cross correlation.
% ISEVENFUNCTION - Test if function is even.
% MIDDLEPAD - Cut or extend even function.
%
% Functions
% EXPWAVE - Complex exponential wave.
% PCHIRP - Periodic chirp.
% SHAH - Shah distribution.
% PHEAVISIDE - Periodic Heaviside function.
% PRECT - Periodic rectangle function.
% PSINC - Periodic sinc function.
%
% Window functions
% PGAUSS - Periodic Gaussian.
% PSECH - Periodic SECH.
% PBSPLINE - Periodic B-splines.
% FIRWIN - FIR windows (Hanning,Hamming,Blackman,...).
% FIRKAISER - FIR Kaiser-Bessel window.
% FIR2LONG - Extend FIR window to LONG window.
% LONG2FIR - Cut LONG window to FIR window.
%
% Filtering
% FIRFILTER - Construct an FIR filter.
% BLFILTER - Construct a band-limited filter.
% WARPEDBLFILTER - Warped, band-limited filter.
% PFILT - Apply filter with periodic boundary conditions.
% MAGRESP - Magnitude response plot.
% TRANSFERFUNCTION - Computer the transfer function of a filter.
%
% Hermite functions and fractional Fourier transforms
% PHERM - Periodic Hermite functions.
% HERMBASIS - Orthonormal basis of Hermite functions.
% DFRACFT - Discrete Fractional Fourier transform
% FFRACFT - Fast Fractional Fourier transform
%
% Approximation of continuous functions
% FFTRESAMPLE - Fourier interpolation.
% DCTRESAMPLE - Cosine interpolation.
% PDERIV - Derivative of periodic function.
%
% Cosine and Sine transforms.
% DCTI - Discrete cosine transform type I
% DCTII - Discrete cosine transform type II
% DCTIII - Discrete cosine transform type III
% DCTIV - Discrete cosine transform type IV
% DSTI - Discrete sine transform type I
% DSTII - Discrete sine transform type II
% DSTIII - Discrete sine transform type III
% DSTIV - Discrete sine transform type IV
%
% For help, bug reports, suggestions etc. please send email to
% ltfat-help@lists.sourceforge.net