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Estimate

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Added: August 30, 2013 | Visits: 445

Movingslope The gradient function in Matlab allows you to compute the slope of a curve along its entire length. But if your curve is a noisy one, then gradient will also be noisy. In this event one might desire to fit a moderately low order polynomial regression model in a sliding window, then differentiate...



Platforms: Matlab

License: Freeware Size: 10 KB Download (41): Movingslope Download

Added: April 25, 2013 | Visits: 447

Calculate Ambiguity Function and Utilities The zip file contains functions to calculate an Ambiguity Function (XAMB), Upsampled and Interpolated Correlation (XCORRU), and Coherence Function (XCOH). A prefilter can be specified in each function to "sharpen" correlation peaks.XAMB calculates an estimate of the (cross-)ambiguity function. A...





Platforms: Matlab

License: Freeware Size: 10 KB Download (38): Calculate Ambiguity Function and Utilities Download

Added: August 05, 2013 | Visits: 392

Estimatenoise Some curve fitting or smoothing tools can benefit from knowledge of the noise variance to expect on your data. Kalman filters use this information, also some spline fitting tools. So I wrote a function to extract the noise variance from a signal vector. It also works on any specified dimension of...


Platforms: Matlab

License: Freeware Size: 10 KB Download (43): Estimatenoise Download

Added: September 16, 2013 | Visits: 533

Direction of Arrival Estimation with MUSIC Algorithm In many practical signal processing problems, the objective is to estimate from measurements a set of constant parameters upon which the received signals depend.For example, high-resolution direction-of-arrival (DOA) estimation is important in many sensor systems such as radar, sonar, electronic...


Platforms: Matlab

License: Freeware Size: 10 KB Download (43): Direction of Arrival Estimation with MUSIC Algorithm Download

Added: September 14, 2013 | Visits: 513

Wind Turbine System Identification The goals of this project are to:o Used ERA to investigate/estimate model order (degree) and State Space Modelo Compare Power Curves of identified model and Manufactures specificationso Estimated/predicted output power based on wind speed input (ARX and ARMAX)o Identify a SkyStream3.7 Wind...


Platforms: Matlab

License: Freeware Size: 2.22 MB Download (40): Wind Turbine System Identification Download

Added: September 06, 2013 | Visits: 370

Peak Interpolation Sometimes it is important to be able to estimate the peak of a sampled continuous function between the samples. This is called subsample peak interpolation and is used in radar, delay estimation, and communication. Typically one fits a model to the sampled data and then finds the maximum of the...


Platforms: Matlab

License: Freeware Size: 10 KB Download (40): Peak Interpolation Download

Added: September 03, 2013 | Visits: 337

Noise variance estimation Suppose that you have a signal Y (Y can be a time series, a parametric surface or a volumetric data series) corrupted by a Gaussian noise with unknown variance. It is often of interest to know more about this variance. EVAR(Y) thus returns an estimated variance of the additive noise.EVAR provides...


Platforms: Matlab

License: Freeware Size: 10 KB Download (40): Noise variance estimation Download

Added: June 05, 2013 | Visits: 444

A Fast Image Segmentation using Delaunay Triangulation This function applies the Delaunay-based image segmentation, which is a fully automated process that does not require initial estimate of number of clusters.The core idea is to apply Delaunay triangulation to the image histogram instead of the image itself. That reduces the sites required to...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 9.91 MB Download (42): A Fast Image Segmentation using Delaunay Triangulation Download

Added: May 10, 2013 | Visits: 244

Ordinary Kriging This function completes what I have started with the functions variogram and variogramfit. It is not intended to be a highly optimized code for performing kriging but may have educational value. Note that for using kriging, you should download the latest version of variogramfit.kriging uses...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (42): Ordinary Kriging Download

Free Split and Merge Expectation Maximization for MultiVariate Gaussian Mixture 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


Added: April 20, 2013 | Visits: 400

Fminspleas I need to thank Duane Hanselman for suggesting this great idea.Fminspleas is a simple nonlinear least squares tool that fits regression models of the formY = a1*f1(X,C) + a2*f2(X,C) + ... + an*fn(X,C)X can be any array, so it works on multidimensionalproblems, and C is the set of only...


Platforms: Matlab

License: Freeware Size: 10 KB Download (41): Fminspleas Download

Added: August 10, 2013 | Visits: 435

Logrank Comparison of two survival curves can be done using a statistical hypothesis test called the log rank test. It is used to test the null hypothesis that there is no difference between the population survival curves (i.e. the probability of an event occurring at any time point is the same for each...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (39): Logrank Download

Added: June 05, 2013 | Visits: 314

regstats2 [ADDITION_1]This enhanced version of regstats has implemented several methods to estimate robust standard errors for coefficients: - HC0: White robust t statistics (Eicker,1963,1967; Huber,1967; White,1980) - HC1: With dfe correction (Hinkley,1977) - HC2: White weighted by 1-h (MacKinnon &...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 81.92 KB Download (39): regstats2 Download

Added: April 11, 2013 | Visits: 413

Kernel smoothing density estimate for circular data This is a companion to Matlab's Statistics toolbox ksdensity function and Philipp Berens' CircStat toolbox.The difference with Matlab's ksdensity function is that this function is adaped to circular data, such as wind orientation. Using Matlab's function will give biased values at the extremities...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (39): Kernel smoothing density estimate for circular data Download

A greedy algorithm for data sharpening and constraint handling This function was developed for nonparametric estimation problems where the estimate must satisfy some shape constraint. Our standard example of this is using a kernel density estimator, with the constraint that the estimate can have only one mode.Let x be the observed data, and confun(x,...) be...


Platforms: Matlab


Temporal Potential Function based Path Planner for Dynamic Environments A Dynamic environment is one in which either the obstacles or the goal or both are in motion. In most of the current research, robots attempting to navigate in dynamic environments use reactive systems. Although reactive systems have the advantage of fast execution and low overheads, the tradeoff...


Platforms: Matlab


Added: April 04, 2013 | Visits: 282

musysid Mu-Tools based Multivariable System IdentificationThe Musysid folder contains some useful tools for :- black box MIMO system identification- state space system fitting from a given frequency response- converting frequency response data between the MU-TOOLS Toolbox and the SYSTEM IDENTIFICATION...


Platforms: Matlab

License: Freeware Size: 10 KB Download (44): musysid Download

Blind Direct-to-Reverberant Energy Ratio (DRR) Estimation This package contains a Matlab reference implementation of a novel algorithm to estimate the direct-to-reverberant energy ratio (DRR) blindly from a dual-channel reverberant speech signal.Within the Matlab script 'DRR_est_example.m', a speech signal is convolved with room impulse responses having...


Platforms: Matlab

License: Freeware Size: 7.7 MB Download (41): Blind Direct-to-Reverberant Energy Ratio (DRR) Estimation Download

Added: June 05, 2013 | Visits: 326

Hough Transform for circle detection This Hough transform is highly optimized. It uses the midpoint circle algorithm to draw the circles in voting space quickly and without gaps. It also includes an option for searching only part of the image to increase speed if a rough estimate of the circle locations is known.


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 10 KB Download (40): Hough Transform for circle detection Download

Added: August 26, 2013 | Visits: 379

Estimating the number of clusters via System Evolution (SE) is developed to estimate the number of clusters (NC) for PAM clustering algorithm. By inspecting whether it is stable that two potential clusters are separated or merged, SE focuses on the separability of two closest clusters among k potential clusters (called twin-clusters) when a data set...


Platforms: Matlab

License: Shareware Cost: $0.00 USD Size: 51.2 KB Download (40): Estimating the number of clusters via System Evolution Download

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