Sigma Lambda Phi Confraternity

[alpha,delta] = eclip2equat(lambda,beta) returns the right ascension and declination in the equatorial coordinate system corresponding to the longitudinal and latitudinal coordinates in the ecliptic coordinate system (lambda and beta).[lambda,beta] = equat2eclip(alpha,delta) returns the...

This file contains functions for:- estimating the quantizer noise from DSM and- estimating the mismatch noise from DWA-DAC.Both (time-domain) models generate noise estimate for arbitrary input vector (dc, sinusoid, n-tone, sawtooth etc.).Applicable to bandpass DSMs and bandpass DWA.For...

Within a sigma range separable filters with integer parameters are sought. The filters have a sum which is an integer power of 2 in order to divide the filter result by shifting the bits.


Platforms: Matlab

Using the Cholesky decomposition, it generates n iterations of multivariate Gaussian random variables for a given mean vector (mu) and variance-covariance matrix (sigma).mvgrnd(mu,sigma,n)


Platforms: Matlab

Auto Gaussian & Gabor Surface fit---2 functions to fit a 2D Gaussian or 2D 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 (sum of squared error) for...


Platforms: Matlab

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

This script generates artificial spatial data using a first order spatial autoregressive process (AR1)The process isX(i,j) = PHI*(X(i,j-1)+X(i,j+1)+X(i-1,j)+X(i+1,j) + errorTo generate a 10x10, periodic spatial pattern, with normal error distribution, and a variance of SIGMA, the command...


Platforms: Matlab

Calculates the min and max of a positive triangular distribution given a standard deviation (sigma) and assuming the mode = 1.This function can handle single value,vector or matrix inputs of sigma. For sigma > 1/sqrt(6), the distribution will be asymmetrical with minimum = 0 and mode = 1.


Platforms: Matlab

IMGAUSSIAN filters an 1D, 2D color/greyscale or 3D image with a Gaussian filter.Instead of using a multidimensional Gaussian kernel, it uses the fact that a Gaussian kernel can be separated in 1D kernels.By the default the code uses IMFILTER for the filtering. But also a cache efficient MEX /...


Platforms: Matlab

Find those points (xi,yi) who are inside the polygone defined by the vectors (x,y).Syntax: [xin,yin,Ind]=Inside(X,Y,xi,yi)where Ind is the index of (xi,yi) that are inside the polygone Example: %--- create polygone (x,y) phi=linspace(0,2*pi,50); X=(1+0.2*sin(6*phi)).*cos(phi);...


Platforms: Matlab

Features:[1] real-valued spherical harmonicsusing real coefficients[2] support flexible band intervals(l=0:dl:L) including both full bandSH (dl=1) and even order only SH (dl=2)[3] evaluate both function valuesf(theta,phi) and the derivativesof f w.r.t theta and phi. Can be usedfor finding peaks...


Platforms: Matlab

Because the Lambda-Physik FL3001 and FL3002 tunable dye lasers are old, they require a protocol that is now outdated. This package includes a stand-alone version of the GPIB dll file interface to a GPIB board, and a set of m-file wrappers to the dll file. This .zip also contains m-files that use...


Platforms: Matlab

For a full description of the models, refer to the September 2007 MATLAB Digest article.http://www.mathworks.com/company/newslette...sigmadelta.htmlWe present a series of Simulink models to design a high-level behavioral model of a Sigma-Delta ADC. The high-level behavioral model has an Analog...


Platforms: Matlab

This toolbox includes a complete set of blocks implemented in the Simulink environment, which allows designers to perform time-domain behavioral simulations of switched-capacitor sigma-delta modulators.The proposed set of blocks takes into account most of the SC sigma-delta modulator...


Platforms: Matlab

This function segments (clusters) an image into object classes, and estimates and corrects for slow varying illumination artifacts. Estimates and corrects for bias field in 3D MRI, streak artifacts in CT, and illumination artifacts in color photos.It's an implementation of the paper of M.N. Ahmed...


Platforms: Matlab

Creates a number of samples from a specified number of dimensions and centers them around a given mean, and within a given covariance range. You might not find it very useful, but hey, I need something to do this so why not.To use:You need to generate 1000 samples from a 3 dimensional Gaussian...


Platforms: Matlab

The program is simple to use and it will help to find the call/put option price of Dividend or non dividend paying stocks using Black Scholes Formula.Input: Initial stock price(S0), Strike price(K), Interest rate per annum(r), Expiry time in year (T), Volatility (sigma) then it will calculate...


Platforms: Matlab

Bullseye is a laser beam analysis application. Images can be acquired from any USB or Firewire camera using the DC1394 standard supported by pydc1394 or pyflycapture2 from pointgrey. The beam analysis mostly adhere to ISO-11146 and determines centroid, 4-sigma width (~1/e^2 intensity width),...


Platforms: *nix

[MU, SIGMA, D] = TRUNCLOGNORMEST(DATA) returns the estimated parameters of the lognormal distribution, with unknown left truncation, using the sample data of percent of observations greater than observed quantities.DATA is assumed to be nx2 where the first column is a set of known values, and the...


Platforms: Matlab

This simulation was generated to compare the MASH 111 SDM with other types of SDMs. This file outputs the average fraction to compare with the one specified as an input, and plots the noise. The Multi-feedback SDM which this was compared to is submitted in a separate posting.


Platforms: Matlab