Download Shareware and Freeware Software for Windows, Linux, Macintosh, PDA

line Home  |  About Us  |  Link To Us  |  FAQ  |  Contact

Serving Software Downloads in 976 Categories, Downloaded 30.066.129 Times

Toolbox Alpert Transform 1.0

  Date Added: April 12, 2013  |  Visits: 206

Toolbox Alpert Transform

Report Broken Link
Printer Friendly Version


Product Homepage
Download (18 downloads)

The Alpert transform is a multiwavelets transform based on orthogonal polynomials. It was originally designed for the resolution of partial differential and integral equations, since it avoids boundary artifact and can be used with an arbitrary sampling.The reference for the numerical algorithm:Bradley K. Alpert, Wavelets and Other Bases for Fast Numerical Linear Algebra, in Wavelets: A Tutorial in Theory and Applications, C. K. Chui, editor, Academic Press, New York, 1992.And more theoretical (continuous setting):B.K. Alpert, A class of bases in L^2 for the sparse representatiion of integral operators, in SIAM J. Math. Anal., 24 (1993), 246-262.The strengh of this transform is that you can transform data sampled irregularly. Of course this algorithm runs in linear time, i.e. O(n). The use of multiwavelets remove any boundary artifact (which are common with wavelet of support > 1, e.g. Daubechies wavelets), but the price to pay is that the wavelets functions are not continuous, they look like the Haar basis functions. So do not use this transform to compress data that will be seen by human eyes (although the reconstruction error can be very low, the reconstructed function can have some ugly steps-like artifacts).In this toolbox, you can transform a signal (1D, 2D, nD) with arbitrary length and arbitrary sampling (you must each time provide sampling locations in a parameter pos).The number of vanishing moments (which is also the degree of the polynomial approximation+1) is set via the parameter 'k' (default=3). You can provide different numbers of vanishing moments for X and Y axis, using k=[kx,ky] (default k=[3,3]).Dichotomic Grouping Functions: All the transforms require to recursively split the data. For each transform a default splitting rule is used, but you can provide your own partition via a parameter part. The way you split the data (isotropicaly, using a prefered direction, etc) will lead to various behaviour for the transform (of course this is relevant for 2D transform only, since the splitting rule in 1D is always the same). The function to perform an automatic grouping is 'dichotomic_grouping' (it can provide orthogonal split along the axis or isotropic using k-means)

Requirements: No special requirements
Platforms: Matlab
Keyword: Approximation Default Length Locations Moments Number Parameter Provide Vanishing
Users rating: 0/10

License: Shareware Size: 716.8 KB
TOOLBOX ALPERT TRANSFORM RELATED
Business  -  Harvesting World 1.0.3
Harvesting World - North America's Premiere Used Combines trade area covers Nebraska, North and South Dakota, Minnesota, Wisconsin and the western two-thirds of Iowa, 32 HARVESTING WORLD store locations throughout the Midwest provide quality used...
2.8 MB  
Libraries  -  Test::Number::Delta 1.03
Test::Number::Delta is a Perl module to compare the difference between numbers against a given tolerance. SYNOPSIS # Import test functions use Test::Number::Delta; # Equality test with default tolerance delta_ok( 1e-5, 2e-5, values within...
18.43 KB  
Communication  -  Rader Autocorrelation 1.0
This M-File calculates the autocorrelation of a random process by the method of Rader (mentioned e. g. in Karl Kammeyer, "DIGITALE SIGNALVERARBEITUNG : Filterung und Spektralanalyse"):Y=akfrader(X,[M])X: stationary random process (Vektor)Y:...
10 KB  
Development Tools  -  qtukey 1.0
This function finds the Tukey's q studentized range critical value. This modified macro is based on the Fortran77 algorithm AS 190.2 Appl. Statist. (1983). It needs the sample degrees of freedom (must be the same for each sample), the k number of...
10 KB  
Networking  -  WP-RecentComments 2.0.7
Show the recent comments in your WordPress sidebar. You can limit the number of comments, set the maximum length of excerpts, filter out pingbacks and/or trackbacks. You can also enable or disable the avatars, resize and reposition them. Besides...
133.12 KB  
Programming  -  AdaControl 1.6r8
AdaControl is a free (GMGPL) tool that detects the use of various kinds of constructs in Ada programs. AdaControls first goal is to control proper usage of style or programming rules, but it can also be used as a powerful tool to search for use...
1024 KB  
Development Tools  -  Multiclass GentleAdaboosting 1.0
A fast Gentle Adaboost classifier with two different weak-learners: i) decision stump and ii) perceptron. Multiclass is performed with the one-against-all strategy.Usage ------ model = gentleboost_model(X , y , [T] , [options]); Inputs ------- X...
102.4 KB  
Development Tools  -  autocov.m 1.0
computes the sample autocovariance of a time series x for lags from 0 to maxlag, returning a column vector of length maxlag+1. x must be a column vector having length m not less than maxlag+1. If no value is supplied for maxlag, the default is the...
10 KB  
Development Tools  -  Laplacian random number generator 1.0
function y = laprnd(m, n, mu, sigma)%LAPRND generate i.i.d. laplacian random number drawn from laplacian distribution% with mean mu and standard deviation sigma.% mu : mean% sigma : standard deviation% [m, n] : the dimension of y.% Default mu = 0,...
10 KB  
Education  -  SinkCel 0.0.2
Cellular automaton consist of an infinite number of cells, which have a finite number of states. These states change depending on the state of their neighbours. Each cell has the same rule for updating. In this program, the cells can...
10.24 KB  
NEW DOWNLOADS IN SCRIPTS, DEVELOPMENT TOOLS
Scripts  -  Freelancer Script 5.05
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Post projects. Featured projects. Private projects. Sealed projects. Edit/delete projects. Select freelancers....
5.49 MB  
Scripts  -  B2B Script 4.20
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Sign-up Account (Registration of account). Lead generation tools (for the sellers). Email verification to...
5.49 MB  
Scripts  -  B2C Script 5.06
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). The script comes with totally editable site colors, icons and graphics Multilevel categories allows extensive browsing Admin can change Category ordering or...
5.49 MB  
Scripts  -  Social Networking Script 2.86
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Registration with name, email, password, date of birth etc. User can add multiple school, college, university with start...
5.49 MB  
Scripts  -  Business Networking Script 8.04
Main Features: 100% Secured. Email Support (3 Years). FREE Updates (3 Years). Ajax based interface. Profile creation. Different types of profile. Profile for jobseekers, employers and employed...
5.49 MB  
Development Tools  -  VMP Viewer 1.0
This is a very rudimentary tool to visualize the VMP files generated by BrainVoyager. Useful to share files with people who do not have BV.
10 KB  
Development Tools  -  Sending reports and timestamped file by emailing 1.0
main executing reference usage:[1] usage_send_mail.mIllustrates email sending with multiple separate files or single timestamped tar file. Attachment failure is properly handled, with continuation of report emailing without the attachment.[2]...
768 KB  
Development Tools  -  IrisMVC 2.0 rc1
IrisMVC is an OOP PHP framework that developers can use as a strong and secure foundation to build on various web applications following the Model-View-Controller (MVC) pattern. It provides the basic functionality developers need, without...
51.2 KB  
Development Tools  -  7-Zip for Script 4.42
7-Zip is a file archiver with a high compression ratio.Features:- High compression ratio in new 7z format with LZMA compression- Supported formats:- Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR- Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM,...
624.64 KB  
Development Tools  -  Barnardextest 1.0
This file, as the Fisher's exact test, performs the exact probability test for a table of frequency data cross-classified according to two categorical variables, each of which has two levels or subcategories (2x2). It is a non-parametric...
10 KB