Computation

Solves the difficulty of computing and visualizing the DFT of an array that can be caused by (a) the units of frequency, (b) the mirroring effect, (c) the complex nature.% Inputs: -t, a time array evenly spaced 0:tstep:T% -x, the function array% -pl, {0,1} to display plot% Outputs: - f a...

Serves as a first attempt to get publicly available MATLAB code for computing the hypervolume and hypervolume contributions. The implementation is usable in 2D and 3D. For 4D and beyond, it is not so efficient, but it does produce correct results. Contributions are very welcome. The code is also...

A common technique for removing noise from images is by blur-ring them with a weighted mean or a Gaussian filter. Through theseprocesses noise reduction is achieved, but unfortunately, valuableinformation is lost and the details of object boundaries aredeformed. A solution to this problem,...


Platforms: Matlab

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

R = RCR(S) computes the semi-edge-length of the mean-centered hypercube with 95% probability given S, which is either a covariance matrix or a vector of standard deviations from a multivariate normal distribution. If S is a real, nonnegative vector, RCR(S) is equivalent to RCR(DIAG(S.^2)). Scalar...


Platforms: Matlab

This file is a fast computation of Jmap, which introduce in [1]. Jmap is an edge indicator which insensitive to noise and texture.sample usage:1.compile:mex scale_sum.cpp2. read an image:img = imread('tiger.jpg');3.Jmap computation:Jmap = cmp_Jmap(img, 3, 7);4. display image:subplot(1, 2, 1),...


Platforms: Matlab

Gabor-function convolution masks are increasingly used in image processing and computer vision. This function simply computes the cosine and sine masks for a given width, period and orientation. The masks returned are properly normalised. It is not highly optimised - e.g. the symmetries are not...


Platforms: Matlab

Routines for computation of Weber's parabolic cylinder functionsand their derivatives are provided for both moderate and greatvalues of the argument. Standard, real solutions are considered.Tables of values are included. Documentation in pdf format is added.


Platforms: Matlab

Solves the linear least squares problem with nonnegative variables using the newton's algorithm in:Portugal, Judice and Vicente, A comparison of block pivoting and interior point algorithms for linear least squares problems with nonnegative variables, Mathematics of Computation, 63(1994), pp....


Platforms: Matlab

Solves the linear least squares problem with nonnegative variables using the predictor-corrector algorithm in:Portugal, Judice and Vicente, A comparison of block pivoting and interior point algorithms for linear least squares problems with nonnegative variables, Mathematics of Computation,...


Platforms: Matlab

This small package computes sums and dots product using quadruple precision accumulation or such that allmost full double precision is achieved whatever the condtion number of the computation may be. There are 4 routines qsum, fpsum, qdot & fpdot plus 2 mains for testing purpose.If symbolic...


Platforms: Matlab

This function calculates a room's impulse response for an arbitrarily positioned sound source in an arbitrarily dimensioned rectangular room, as it would be heard at an arbitrary position. The output of RIR.m is a vector and can be used as an FIR filter to produce a reverb effect. To implement...


Platforms: Matlab

Generate Exhaustive Permutations--------------------------------------------------[1] main executing reference usage: usage_generateExhaustivePermutationThe objective is to illustrate generation of exhaustive permutation of symbols given the symbolic bases.The method of generation is a...


Platforms: Matlab

ToleranceFactor computes the exact tolerance factor k for the two-sided (optionally also for the one-sided) p-content and gamma-confidence tolerance interval TI = [Xmean - k * S, Xmean + k * S],where Xmean = mean(X), S = std(X), X = [X_1,...,X_n] is a random sample from the distribution...


Platforms: Matlab

Calculate windowed mutual information between two signals up to a pre-defined lag. The estimation of the (joint) probabilities is optimized, hence, entire computation is very fast.


Platforms: Matlab

This class collection allows to automatically supervise changes to properties' default settings and create reports of different detail and level for them.The purpose of this tool is to improve the reliability and quality of small software tools or even frameworks by ensuring that any end-users of...


Platforms: Matlab

A collection of M-Files that provide a succesful implementation of the difficult problem of numerical computation of multivariate normal probabilities. This is very useful for the distributed detection with nuisance parameters and in classical multivariate problems. Two methods are used for which...


Platforms: Matlab

Efficient and accurate computation of free baroclinic coastal-trapped waves, using pseudospectral methods, over general depth profiles for arbitrary vertical density profiles in horizontally semi-infinite domains.The methods are described in full in the accompanying paper:E.R. Johnson, J.T....


Platforms: Matlab

Occasionally I have had to solve large systems of differential equations which result in matlab running out of memory during evaluation. Odesplit breaks up the simulation period into a series of chunks to ease this problem. At each split point in the evaluation a function specified by the user is...


Platforms: Matlab

http://simulations.narod.ru/There are 400 balls in 2d that has finite size and can pass trough each other with friction. At distances more than size they have gravitation forces. Initially system rotated slightly as global. Code well vectorized, bsxfun used.The result of simulation is here:It is...


Platforms: Matlab