Vectorized

NBODYVECT - Fully vectorized n-body equationnbodyVect(x0,dx0,mus,t) integrates the n-body equations of motion using either a symplectic second order integrator, or any of the standard built-in or user supplied first order integrators. x0 - 3n x 1 stacked initial position vectors:...

The Floyd-Warshall algorithm computes the all pairs shortest path matrix for a given adjacency matrix. The algorithm is O(n^3), and in most implementations you will see 3 nested for loops. This is very inefficient in Matlab, so in this version the two inner loops are vectorized (and as a result,...

The vectorized transpose matrix, Tmn, is the matrix that permutes the vectorization of an m#n matrix A into its transpose vectorization. For example, if the vectorization of A is defined as vec(A), or A(:), then Tmn*vec(A) = vec(A').EXAMPLEThe vectorized transpose matrix can be used to reverse...


Platforms: Matlab

A fast vectorized implementation of the ncc that handles color (3 channel) images as well as gray level.The algorithm for colored images is based on the ncc formulation for vector valued functions.Note: A bug that I found in the normxcorr2 was also fixed here.


Platforms: Matlab

x = BISECTION(f,LB,UB,target,tol) finds array x +/- tol (LB < x < UB) such that f(x) = target array.This function is meant for use in finding roots of monotonic vectorized functions very quickly for situations where many function calls must be used. It is designed to be simple, not robust, but...


Platforms: Matlab

Up to now, to find the first non-zero element of a matrix along a column (for example) user might:1. Use for-loop with FIND command for j=1:size(A,2) ... = find(A(:,j), 1, 'first'); end 2. Use other vectorized methods, often time not very straight-forwards (MAX, LOGICAL, SPARSE, etc...). This...


Platforms: Matlab

Are you like me and finding yourself wanting to change the parameters of multiple Simulink objects at once? Do you run find_system only to then take the output and use it in a for loop that calls set_param? Are you tired of your for loop crashing because a block name has a carriage return or an...


Platforms: Matlab

The raytracer is made as a mini project for a computer vision and graphics lecture. Started as for statements and ended as this fast vectorized version. The speed up is something like 10 minutes versus 10-12 seconds for a 1024x1024 image.It is possible to change properties for the object,...


Platforms: Matlab

In 1975, Vincenty published a rapidly converging algorithm for computing the distance between points on an ellipsoidal earth. The algorithm is precise to within a few millimeters. Since then, his algorithm has since seen significant implementation in geodesy and engineering. After adjusting the...


Platforms: PHP

BDD BuDDy is a Binary Decision Diagram library, with : many highly efficient vectorized BDD operations, dynamic variable reordering, automated garbage collection, a C++ interface with automatic reference counting, and much more. The BDD package presented here was made as part of a PhD project...


Platforms: *nix

SIMD Cross-platform headers is a cross- platform, cross-compiler, cross CPU C/C++ header collection that aids the creation portable vectorized (SIMD) C/C++ code. SIMD Cross-platform headerst supports (or partially supports) x86 (MMX/SSE/SSE2) GCC and MSVC, PPC Altivec GCC and CodeWarrior, ARM...


Platforms: *nix

Topaz Clean is a powerful detail smoothing and edge stylization plug-in that simplifies advanced techniques typically used for creating smooth, flawless skin and curly, vectorized effects - allowing you to quickly and easily reduce or remove the depth of detail within images, while maintaining...


Platforms: Windows

This function implements vectorized FFTs on a GPU. The answer is the same as the fft and ifft matlab functions.You need to install the GPUFFTW2.0 library of Naga K. Govindaraju http://gamma.cs.unc.edu/GPUFFTW/ . On Naga's wed site, you can see the system requirements. It works on linux and...


Platforms: Matlab

This mex file implements vectorized FFTs on multiple threads. When a matrix is passed to FFTmt, it is divided in "numCPU" and each fraction of the problem is executed in a separate threadExample: if numCPU = 2 and the matrix has 256x2^14 elements, 128 FFTs are performed in each thread, allowing...


Platforms: Matlab

Convert ECI (CIS, Epoch J2000.0) Coordinates to WGS 84 (CTS, ECEF) Coordinates. This function has been vectorized for speed.Example Function Call:>> [r_ECEF v_ECEF] = ECItoECEF(JD,r_ECI,v_ECI);Where:JD is the Julian Date vector [1 x N] (units are in days)r_ECI is the position vector [3 x N] (any...


Platforms: Matlab

Robust Particle Swarm toolbox implementing Trelea, Common, and Clerc types along with an alpha version of change detection.This toolbox is designed for researchers in Computational Intelligence as well as application developers, students, and classroom labs. It is robust enough that several...


Platforms: Matlab

The Mogi [1958] model allows to calculate analytic solution for surface deformation due to a point source in an elastic half-space. This model is widely used to simulate ground deformation produced by local perturbation like volcanic magma chamber. It computes displacements, tilt and strain in a...


Platforms: Matlab

Particle swarm optimization is a derivative-free global optimum search algorithm based on the collective intelligence of a large group of intercommunicating entities. The individual particles are simple and primitive, knowing only their own current locations and fitness values, their personal...


Platforms: Matlab

SpeedyGA is a vectorized implementation of a genetic algorithm in the Matlab programming language. Without bells and whistles, it faithfully implements the specification for a Simple GA given on pgs 10, 11 of M. Mitchell's GA book. See comments in code for details.This script has played a crucial...


Platforms: Matlab

Learn how to use the Profiler tool, vectorized functions, and other tricks to writing efficient MATLAB code. This article includes how to convert any array into a column vector, bounding a value without if statements, and repeating/tiling a vector without repmat.Contents: * Introduction * The...


Platforms: Matlab