Fourier Transform Spectroscopy
HARMASYLLABLESEG - Segments a signal stored in a WAV file into individual syllables. Also graphs the spectrogram and signal with syllables highlighted in red to show what parts of the signal contain syllables. INPUT: - FILENAME: The path to a signal stored in WAV format. The following arguments...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (46): Harma Syllable Segmentation Download |
The Matlab code in this folder implements 1D-3D NUFFTs via fast Gaussian gridding. The convolution loops are written as C programs to be compiled as mex files from the Matlab command prompt. Further mathematical details about the code can be found in L. Greengard and J. Lee, "Accelerating the...
Platforms: Matlab
License: Freeware | Size: 481.28 KB | Download (65): NUFFT, NFFT, USFFT Download |
This framework facilitates short-time speech processing. A vector containing audio data samples is taken as input, the short-time Fourier transform (STFT) is then computed and the resulting complex spectrum is decomposed into magnitude and phase spectra. No modification is made in this 'hello...
Platforms: Matlab
License: Freeware | Size: 522.24 KB | Download (46): Analysis Modification Synthesis Download |
Measures of Analysis of Time Series (MATS) toolkit computes a number of different measures of analysis of scalar time series (linear, nonlinear and other statistical measures). It also contains pre-processing tools (transformations and standardizations), data splitting facility, resampled data...
Platforms: Matlab
License: Freeware | Size: 3.41 MB | Download (63): Measures of Analysis of Time Series toolkit (MATS) Download |
W = mywigner(Ex)W = output Wigner distributionEx = Input electric field (MUST be a column vectorNotes:W = Int(-inf..inf){E(x+y)E(x-y)exp[2ixy]}E(x+y) & E(x-y) are calculated via a FFT (fast Fourier transform) using theshift theorem. The integration is performed via a FFT. Thus it is important for...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (45): Calculate Wigner distribution Download |
smib is a mosaic of FORTH and LISP, C Sauce and an experimental programming language close to mathematical language. In this version : law of large numbers, central limit theorem, hyperbolic trigonometry, warnings are cleaned . Features . Number theory : infinite size integers, arithmetic...
Platforms: *nix
License: Freeware | Size: 3.17 MB | Download (35): smib Download |
In the present program three methods are used to solve a heat conduction problem. This problem is given in M. N. doOCozisik, Heat Conduction, Wiley, New York, 1980. We use pdepe, short times solution based on analytical inversion of a Laplace transform and finally a numerical solution based on...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (51): Use of pdepe and Laplace Transform to Solve Heat Conduction Problems Download |
PDL::Transform::Cartography Perl module contains useful cartographic projections. SYNOPSIS # make a Mercator map of Earth use PDL::Transform::Cartography; $a = earth_coast(); $a = graticule(10,2)->glue(1,$a); $t = t_mercator; $w = pgwin(xs); $w->lines($t->apply($a)->clean_lines());...
Platforms: *nix
License: Freeware | Size: 2.1 MB | Download (103): PDL::Transform::Cartography Download |
PDL::Transform is a Perl module that coordinate transforms, image warping, and N-D functions. SYNOPSIS use PDL::Transform; my $t = new PDL::Transform:: ( ) $out = $t->apply($in) # Apply transform to some N-vectors (Transform method) $out = $in->apply($t) # Apply transform to some...
Platforms: *nix
License: Freeware | Size: 2.1 MB | Download (108): PDL::Transform Download |
CAD::Drawing::Manipulate::Transform is a Perl module with Matrix methods for CAD::Drawing. Provides 3D transformation methods (based on traditional matrix algorithms) for Drawing.pm objects. Coordinate System All of these methods assume a RIGHT-HANDED coordinate system. If you are using a...
Platforms: *nix
License: Freeware | Size: 39.94 KB | Download (127): CAD::Drawing::Manipulate::Transform Download |
Grid::Transform is a Perl module with fast grid transformations. SYNOPSIS use Grid::Transform; $g = Grid::Transform->new([a..o], rows=>5); $g->rotate_270->flip_vertical; print join( , $g->grid), "n"; The Grid::Transform module provides fast methods to transform a grid of arbitrary data...
Platforms: *nix
License: Freeware | Size: 36.86 KB | Download (104): Grid::Transform Download |
This program transforms the images and the sounds using single BIG Fourier Transforms (or DCT/DST,etc.). It produces very interesting and strange effects and allows you to transform sounds to images and vice-versa. To see what it does see the examples .
Platforms: *nix
License: Freeware | Size: 51.2 KB | Download (104): HyperMammut Download |
It tries to approximate a f(x) function with a m term Fourier series, using the quad MATLaB function. Requirements: - MATLAB 7.1.0 or higher
Platforms: Windows, Mac, *nix, Matlab, BSD Solaris
License: Freeware | Download (61): Fourier Series Calculator Download |
The function plot_hht is a realization of the Hilbert-Huang transform (HHT). The HHT decomposes a signal into intrinsic mode functions (or IMFs), and obtain the instantaneous frequency data. It is designed to work well for data that are nonstationary and nonlinear...
Platforms: Matlab
License: Freeware | Size: 1013.76 KB | Download (45): Hilbert-Huang Transform Download |
The function implement the 2D dyadic(Paley) ordered fast in-place Walsh-Hadamard transform, which can be used in signal processing, pattern recognition and Genetic alogorithms. This algorithm uses a Cooley-Tukey type signal flow graph and is implemented in N log2 Nadditions and subtractions. Data...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (46): Fast 2D Walsh-Hadamard Transform Download |
This routine implements Hankel transforms of integer order based on a Fourier-Bessel series expansion. The algorithm is based on a recently published research work:M. Guizar-Sicairos and J. C. Gutierrez-Vega, Computation of quasi-discrete Hankel transforms of integer order for propagating optical...
Platforms: Matlab
License: Freeware | Size: 92.16 KB | Download (51): Integer order Hankel transform Download |
According to shannon theory it is possible to reconstruct a band limited signal from its Fourier components provided it is sampled sufficiently...just to demonstrate this, posting a small example based on that
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (44): Fourier reconstruction of Bandlimited function Download |
These are two M-files d-deDUfourier1d-deDt and d-deDUfourier2d-deDt The first is designed to demonstrate how triangular, rectangular, saw tooth, half wave and full wave rectified signals can be built from superposition of a predefined no of Fourier harmonic terms. It demonstrates how increasing...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (39): Demonstration of Fourier transformation Download |
computes the sequency-ordered discrete Hadamard transform
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (46): sequency-ordered discrete Hadamard transform Download |
The Fourier Calculator (Simulink model) can be used for arbitrary signals. In this case the Wolfer sun spot data are analyzed
Platforms: Matlab
License: Freeware | Size: 993.28 KB | Download (39): Wolfer sun spot data analyzed with the Fourier Calculator Download |