Gaussian Calculationsd
Fit a multivariate gaussian mixture by a cross-entropy method. Cross-Entropy is a powerfull tool to achieve stochastic multi-extremum optimization.Please visit http://iew3.technion.ac.il/CE/ for more informationsi) Please compile mex-files by the mexme_ce_gauss.m (if compiler is not setup, run...
Platforms: Matlab
License: Freeware | Size: 30.72 KB | Download (47): Multivariate Gaussian Mixture Model Optimization by Cross Entropy Download |
GMM-GMR is a set of Matlab functions to train a Gaussian Mixture Model (GMM) and retrieve generalized data through Gaussian Mixture Regression (GMR). It allows to encode efficiently any dataset in Gaussian Mixture Model (GMM) through the use of an Expectation-Maximization (EM) iterative learning...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 40.96 KB | Download (40): Gaussian Mixture Model (GMM) - Gaussian Mixture Regression (GMR) Download |
Free Split and Merge Expectation-Maximization algorithm for Multivariate Gaussian Mixtures. This algorithm is suitable to estimate mixture parameters and the number of conpounds Usage ------- [logl , M , S , P] = fsmem_mvgm(Z , [M0] , [S0] , [P0] , [option]); Inputs ------- Z Measurements (d x N)...
Platforms: Matlab
License: Freeware | Size: 215.04 KB | Download (43): Free Split and Merge Expectation Maximization for MultiVariate Gaussian Mixture Download |
Generate Gaussian or Laplacian pyramids, or reconstruct an image from a pyramid. Contains a demo script doing image blending using pyramids. The function is more convenient to use than the Matlab function impyramid.
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 51.2 KB | Download (45): image pyramid(Gaussian and Laplacian) Download |
This code can be used to solve a set of linear equations using Gaussian elimination with partial pivoting. Note that the Augmented matrix rows are not directly switches. Instead a buffer vector is keeping track of the switches made. The final solution is determined using backward substitution.
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (53): Gaussian elimination with partial pivoting Download |
em_ghmm : Expectation-Maximization algorithm for a HMM with Multivariate Gaussian measurement Usage ------- [logl , PI , A , M , S] = em_ghmm(Z , PI0 , A0 , M0 , S0 , [options]); Inputs ------- Z Measurements (m x K x n1 x ... x nl) PI0 Initial probabilities (d x 1) : Pr(x_1 = i) , i=1,...,d. PI0...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 20.48 KB | Download (40): EM for HMM Multivariate Gaussian processes Download |
not getting results for 4 level/nlevel gaussian pyramid please try for improvement but gray levels are identified for successive levels and code is working wellunable to watch images for intermediate levels
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (38): gaussian pyramid and laplacian pyramid Download |
This is a parallel implementation of the Expectation Maximization algorithm for multidimensional Gaussian Mixture Models, designed to run on NVidia graphics cards supportingCUDA. On my machine, it provides up to 170x performance increases (16 dims, 16 clusters, 1000000 data points).See the report...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 143.36 KB | Download (43): Expectation Maximization of Gaussian Mixture Models via CUDA Download |
Implementation details of (i)-(iii) can be found in [1].The fourth function (gmm2sv.m) is to concatenate the means (i.e. centers) of GMM. The concatenated mean of adapted GMM is known as GMM supervector (GSV) and it is used in GMM-SVM based speaker recognition system. Details of GMM-SVM based...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (41): Useful Matlab Functions for Speaker Recognition Using Adapted Gaussian Mixture Model Download |
The code is explained in the article: Okunev, Pavel, "Fast Computation of the Economic Capital, the Value at Risk and the Greeks of a Loan Portfolio in the Gaussian Factor Model" (July 1, 2005). http://ssrn.com/abstract=758505 This implements one factor Gaussian model. [pd]=pdgs(L,w,p,LL,N) L =...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (44): Cumulative Distribution Function of CDO Loan Portfolio Loss in the Gaussian Factor Model Download |
A fast generator of gaussian mixture samples with a general ND dimensional calling syntax.Permit to sample from a simple multivariate process to several gaussian mixture in a easy way.Please run mexme_sample_mvgm.m to compile on your own platform. (Be sure to mex -setup is done before)
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (38): Fast ND multidimensional gaussian mixture random generator Download |
HYPERGEOMETRIC2F1 Computes a hypergeometric function using the series expansion:f(a,b;c;x)=1 + [ab/1!c]x + [a(a+1)b(b+1)/2!c(c+1)]x^2 +[a(a+1)(a+2)b(b+1)(b+2)/3!c(c+1)(c+2)]x^3 + ...This function solves the Gaussian Hypergeometric Differential Equation:x(1-x)y'' + {c-(a+b+1)x}y' - aby = 0
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (41): Gaussian Hypergeometric Function Download |
The algorithm takes in a 1-D signal and finds the Gaussian derivative of it with the given kernel size and sigma, to provide the zero crossings. The zero crossings are then analyzed to give peaks and valleys. In order to remove very closely situated peaks and valleys, a width (provided by the...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (47): 1-D Gaussian peak and valley detector Download |
MVG is a multivariate Gaussian (normal) random number generator. A user can generate a vector from the multivariate normal distribution of any dimension by specifying a mean vector and symmetric positive-definite covariance matrix. A linear transformation based on the Cholesky decomposition of...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (41): MVG Multivariate Gaussian random number generator Download |
At the moment, the Normal Inverse Gaussian (NIG) distribution is not included in the statistics toolbox. This collection of m-files supplements this toolbox with the most important functionalities for the NIG distribution: random numbers, moments, cdf, pdf and parameters by moment fit. This...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (43): Normal Inverse Gaussian (NIG) distribution - updated version Download |
randgen(mu,mu1,mu2,cov1,cov2,cov3) = Random generation of Gaussian Samples in d-dimensions where d = 2mu, mu1, mu2 = (x,y) coordinates(means) that the gaussian samples are centered around. cov1, cov2, cov3 are the covariance matrices and will vary changing the shape of the distribution, example:...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (39): Gaussian Random Samples Generation Download |
Generates complex generalized gaussian random variables with augmentedcovariance matrix Ta = [2*s 0; 0 2*s];and shape parameter c, where c = 1 corresponds to the Gaussian case.x = cggd_rand(c,s,N) generates a vector 1xN of complex samples with a circulargaussian distribution with shape parameter...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 1024 KB | Download (46): Complex Generalized Gaussian distribution generator Download |
This function plots a Gaussian impulse response, unit impulse and the% convolution/deconvolution of both using MATLAB's 'filter'. Specifically% it uses 'filter' rather than 'deconv' to do the deconvolution and thereby% returns the original Gaussian vector as well as the unit response vector.%...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 71.68 KB | Download (43): Convolve/ Deconvolve Gaussian impulse response and unit impulse vectors Download |
Genereates random number from the closed-skew Gaussian distribution with two different methods:CSN_mcmc.mDoes mcmc, so each realisation are not completely independent% Usage: [res, t_wi, t_inv] =CSN_mcmc(Mu,Sigma,Gamma,Nu,Delta,num,burn)%% Mu,Sigma,Gamma,Nu,Delta: parameters in CSN% num: number...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (39): Closed-skew Gaussian generator Download |
Auto Gaussian & Gabor Surface fit---Functions to fit a 1D Gaussian to a curve and a 2D Gaussian or Gabor to a surface. The routines are automatic in the sense that they do not require the specification of starting guesses for the model parameters. This is done by evaluating the quality of fit for...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (48): Auto Gaussian & Gabor fits Download |