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Sigma Lambda Phi Confraternity software
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Sigma Lambda Phi Confraternity

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Added: August 19, 2013 | Visits: 185

Filter with Gabor Kernel using FFT [G GWINLEN] = genGaborKernelF( MU,NU,sigma,scaleXY,imgSz )GIMG = GABORCONV(IMG,G,GWINLEN)Extract the texture feature using Gabor filter/wavelet. You should first generate cell array G, which is a set of kernels in freq domain, then pass G and the image to the function GABORCONV.



Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (43): Filter with Gabor Kernel using FFT Download

Added: July 27, 2013 | Visits: 332

Generate AR1 spatial data 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

License: Shareware Cost: $0.00 USD Size: 10 KB Download (39): Generate AR1 spatial data Download

Added: July 29, 2013 | Visits: 528

Real-Valued Spherical Harmonics 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

License: Shareware Cost: $0.00 USD Size: 10 KB Download (42): Real-Valued Spherical Harmonics Download

Added: June 17, 2013 | Visits: 560

SDToolbox 2 This toolbox allow the simulation of sigma-delta modulators. considering the most important building block non-idealities. Moreover, it provides functions for evaluating the sigma-delta modulator performance.


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 768 KB Download (44): SDToolbox 2 Download

Added: September 02, 2013 | Visits: 278

Fractal Volatility through Variation Index [VINDX FRACDIM V_SIGMA COVERSIZE] = varIndx(LOW,HIGH) LOW is a column vector of the lowest price in the bar (second, minute, etc). HIGH is a column vector of the highest price in the bar. VINDX is the variation index of the data. FRACDIM is the fractal dimension of the data. V_SIGMA is the...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (39): Fractal Volatility through Variation Index Download

Added: May 23, 2013 | Visits: 400

3D spherical equation plot Graphs a 3 dimensional logarithmic of a function named F(Theta,Phi), theta the elevation angle and phi the rotational angle. Converts to Cartesian coordinates and plots a surface plot with color pattern radiating from the origin.Due my massive use of the community to generate this first time use...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (42): 3D spherical equation plot Download

Added: June 02, 2013 | Visits: 362

H-infinity sub-optimal causal IIR inverse filter [psi gopt] = dfdesign_w(phi, w, d);DFDESIGN_W computes the H-infinity optimal inverse filter of a given filter phi(z).The resulting filter psi(z) minimizes the H-infinity norm of the error systemE_w(z) = [z^(-d) - psi(z)phi(z)]w(z).If an error occurs, use "dfdesign_w_lmi.m".[INPUT]phi: target...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (42): H-infinity sub-optimal causal IIR inverse filter Download

Added: April 27, 2013 | Visits: 428

1-D Gaussian peak and valley detector 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 (43): 1-D Gaussian peak and valley detector Download

Added: May 01, 2013 | Visits: 364

DigitFD DigitFD generates random sample from the fiducial distribution of the parameters mu and sigma [of the unobservable normal distribution], based on the (digitized) measurements from instrument with limited, however known resolution. Here,measurements = round( (mu + sigma * Z)/resolution ) *...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 3.39 MB Download (40): DigitFD Download

Added: June 09, 2013 | Visits: 346

Multivariate Gaussian Distribution 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

License: Shareware Cost: $0.00 USD Size: 10 KB Download (41): Multivariate Gaussian Distribution Download

Added: June 07, 2013 | Visits: 305

gaussian curve fit [sigma,mu,A]=mygaussfit(x,y)[sigma,mu,A]=mygaussfit(x,y,h)this function is doing fit to the functiony=A * exp( -(x-mu)^2 / (2*sigma^2) )the fitting is been done by a polyfitthe lan of the data.h is the threshold which is the fractionfrom the maximum y height that the datais been taken from.h...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (39): gaussian curve fit Download

Added: June 24, 2013 | Visits: 386

powerMAOV1 Estimating of the statistical power of a performed (a posteriori) single factor Multivariate Analysis of Variance (MANOVA).It needs to input the observed parameters among two possible options. Option 1: multivariate observed F-statistic, numerator degrees of freedom, denominator degrees of...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (40): powerMAOV1 Download

Added: July 28, 2013 | Visits: 401

Gaussian Random Samples Generation 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

Added: May 12, 2013 | Visits: 467

Quartile & Percentile Calculation Included in the first line of the script is a sample data set. The script will compute basic statistics on this data set:mean1-sigma (standard deviation)medianfirst quartile (25th percentile)second quartile (50th percentile)third quartile (75th percentile)kth percentileIQRSID


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (40): Quartile & Percentile Calculation Download

Added: August 02, 2013 | Visits: 353

Triangular Distribution Parameters - tridist_pars 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

License: Shareware Cost: $0.00 USD Size: 10 KB Download (39): Triangular Distribution Parameters - tridist_pars Download

Added: July 07, 2013 | Visits: 400

Black Scholes Formula 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

License: Shareware Cost: $0.00 USD Size: 10 KB Download (41): Black Scholes Formula Download

Added: July 16, 2013 | Visits: 317

Auto Gaussian & Gabor fits 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 (40): Auto Gaussian & Gabor fits Download

Added: August 04, 2013 | Visits: 255

Lorenz attaractor plot The Lorenz attractor, named for Edward N. Lorenz, is an example of a non-linear dynamic system corresponding to the long-term behavior of the Lorenz oscillator.The Lorenz oscillator is a 3-dimensional dynamical system that exhibits chaotic flow, noted for its lemniscate shape. The map shows how...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (46): Lorenz attaractor plot Download

Added: August 11, 2013 | Visits: 309

EWMA St.Dev. This code calculates the Exponentially Weighted Moving Average Standard Deviation Exponentially weighted moving average (EWMA) standard deviation applies different weights to different returns. More recent returns have greater weight on the variance. The exponentially weighted moving average...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (45): EWMA St.Dev. Download

Added: June 20, 2013 | Visits: 368

imgaussian 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

License: Shareware Cost: $0.00 USD Size: 10 KB Download (43): imgaussian Download

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