Normalized Quaternions

For purposes of these tools, a quaternion, q, is just a four element vector where q(1:3) is the "imaginary" or "vector" portion of the hypercomplex number, and q(4) is the "real" or "scalar" portion. Consequently, if q represents a rotation, then: q(1) = v1*sin(phi/2) q(2) = v2*sin(phi/2) q(3) =... Platforms: Matlab

This code takes an expression for a normalized AF in spherical coordinates and creates a 3D plot in cartesian coordinates. Examples are specific to Antenna Theory and Design (2nd Ed) by Stutzman and Thiele. Platforms: Matlab

Normalized mutual entropy provides a measure of the diversity of a two dimensional matrix. It takes mutual entropy and normalizes for the marginal entropy of the variable of interest (column variable in the code). See screen shot or embedded references for formula.This code is used for the... Platforms: Matlab

Both functions caculate the Lomb normalized periodogram (aka Lomb-Scargle, Gauss-Vanicek or Least-Squares spectrum) of a vector x with coordinates in t, which is essentially a generalization of the DFT for unevenly sampled data.The codes are transcriptions from Fortran of the subroutines found in... Platforms: Matlab

normxcorr2_general computes the normalized cross-correlation of matrices TEMPLATE and A. The resulting matrix C contains correlation coefficients and its values may range from -1.0 to 1.0.Limitations of normxcorr2:The documentation of normxcorr2 states that, "The matrix A must be larger than the... Platforms: Matlab

Normalized mutual information is often used for evaluating clustering result, information retrieval, feature selection etc. This is a optimized implementation of the function which has no for loops. Platforms: Matlab

The annotation() function in MATLAB requires the X and Y coordinates for the object in normalized units. However, to accurately place objects, (without using GUI) we would like to give the annotation function the coordinates in terms of the current axes. This function transforms the axes... Platforms: Matlab

This script contains a function that creates missing directories for a given path and returns a normalized absolute version of the path.If the given path already exists in the filesystem the filesystem is not modified.Otherwise makepath creates directories along the given path using the... Platforms: Windows, Mac, *nix, Python, BSD Solaris

Data stored column-wise in an input matrix are normalized as time series, with options to output just the normalized data, or the norm of each column as well. Fast, uses no loops. Platforms: Matlab

alculate the normalized partial energy sequence (NPES) for a given signal vector X.If a particular transform is capable of capturing the key features of a signal in few coefficients, the NPES will approach unity for relatively quickly.Ref: Percival and Walden, Wavelet Methods for Time Series... Platforms: Matlab

In the video associated with the demo here:http://www.mathworks.com/matlabcentral/fil...47-using-matlabThere was a teaser posed in the video asking why the 747 in the animation did a 360 flip at certain points in the trajectory. The answer was: We were not using quaternions.This demo uses the... Platforms: Matlab

once you have the normal vector, this toolkit will calculate normalized tangent plane vector for you. Platforms: Matlab

Have you ever created an object for your GUI using Normalized units, but wanted to get its position in Points to line up a text object according to the font size? Instead of SETting the Units property to Points, GETting the Position, and SETting the Units back to Normalized, just use... Platforms: Matlab

http://simulations.narod.ru/Run cross_product.mSee how it looks here:Also plot [bxa], n - normalized [axb] and signs. create_3d_arrow.m and update_3d_arrow.m function s to work with 3d arrow. Platforms: PHP

Using Affymetrix CEL files as its source, this script combines quantile normalized SNP A and B probe intensities for each marker into a theta value, then calculates B-Allele Frequencies for each marker. For information on accessing B Allele Frequencies for Illumina data, Platforms: Mac

Calc3D is a calculator for 3-dimensional vectors, matrices, complex numbers, quaternions. For objects ( like point, line, plane and sphere) distances, intersections, volume, area of squeres, area of a triangle can be calculated.Cartesian coordinates, spherical coordinates und cylindrical... Platforms: Windows

MathGL++ is a class library for fast C++ maths for use in OpenGL C++ projects. Easy to use and similar to the OpenGL API. Matricies, Vectors, Quaternions, Linear polynomials with eigen systems are all going to be included. Platforms: *nix

This program is open source code of fast Fourier transform in matlab.Where y is the input argument and p is the normalized size of the input. Lety = [1 2 3 4 ];x= length(y);m= log2(x);p= ceil(m);To call the function useft2(y,p); Platforms: Matlab

The different low dimensional embeddings are an orthonormal coordinate system generated from a1. Diffusion process defined on the data2 . Normalized Laplace Beltrami operator3. Normalized Focker Plank operatorThis is a nonlinear dimension reduction technique using the concepts of manifold... Platforms: Matlab

[Fs,Vs]=subtri(F,V,n)Sub-triangulates the triangles defined by the patch format data F (faces) and V (vertices). Can be used to increase the density of triangulated data or to triangulate the icosahedron to create geodesic sphere triangulations with desired density.Creates n addition points on... Platforms: Matlab