Linear Least Squares Fit
This function either displays Zernike polynomials over a circular, hexagonal, elliptical, rectangular or annular shaped pupil, or fits surface data to these pupil shapes. See Mahajan, V.N., G.-m. Dai, "Orthonormal polynomials in wavefront analysis: analytical solution," J. Opt. Soc. Am. A, Vol....
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 20.48 KB | Download (40): ZernikeCalc Download |
Performs polynomial fits that pass through a specified point (x0,y0).The application is to give a least squares fit that is 'exact' at a desired data point, e.g. an equilibrium point in a nonlinear equation of motion implemented via polynomial approximation. Discussion of theory included in...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (43): polyfit2 Download |
polyfitweighted2.m and polyval2.m---------polyfitweighted2.m: Find a least-squares fit of 2D data z(x,y) with an n th order polynomial, weighted by w(x,y).polyval2.m: Evaluate 2D polynomial produced by polyfitweighted2.m.Usage polyfitweighted2-----P = polyfitweighted2(X,Y,Z,N,W) finds the...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 20.48 KB | Download (43): 2D Weighted Polynomial Fitting and Evaluation Download |
CurveFitter program performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that...
Platforms: Windows, Other
License: Shareware | Cost: $15.00 USD | Size: 3.08 MB | Download (263): Regression Analysis - CurveFitter Download |
CurveFitter performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that you...
Platforms: Windows, Windows 7, Other
License: Shareware | Cost: $15.00 USD | Size: 3.06 MB | Download (83): CurveFitter Download |
CurveFitter performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that you...
Platforms: Windows, Windows 7, Other
License: Shareware | Cost: $15.00 USD | Size: 3.06 MB | Download (266): Nonlinear regression - CurveFitter Download |
DataFitting is a powerful statistical analysis program that performs linear and nonlinear regression analysis (i.e. curve fitting). DataFitting determines the values of parameters for an equation, whose form you specify, that cause the equation to best fit a set of data values. DataFitting can...
Platforms: Windows, Windows 7, Other
License: Shareware | Cost: $15.00 USD | Size: 2.92 MB | Download (77): Nonlinear analysis - DataFitting Download |
Performs computations associated with matrices, including solution of linear systems of equations (even least squares solution of over-determined or inconsistent systems and solution by LU factors), matrix operations (add, subtract, multiply), finding the determinant, trace, inverse, adjoint, QR...
Platforms: Windows
License: Shareware | Cost: $15.00 USD | Size: 2.22 MB | Download (267): Linear Algebra Download |
This is a fast and non-iterative ellipse fit. Usage: A = EllipseDirectFit(XY)Input: XY(n,2) is the array of coordinates of n points x(i)=XY(i,1), y(i)=XY(i,2) Output: A = [a b c d e f]' is the vector of coefficients of the equation of the best fitting ellipse: ax^2 + bxy + cy^2 + dx + ey + f =...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (45): Ellipse Fit (Direct method) Download |
This is a robust and accurate circle fit. It works well even if datapoints are observed only within a small arc. This circle fit was proposed by V. Pratt in article "Direct least-squares fitting of algebraic surfaces", Computer Graphics, Vol. 21, pages 145-152 (1987). It is more stable than the...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (43): Circle Fit (Pratt method) Download |
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
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (43): Auto Gaussian & Gabor Surface Fit Download |
Excel add-in with eleven powerful worksheet functions for 1, 2 and 3 variable lookup and interpolation. Interpolation modes include: closest-value, linear, piecewise parabolic or hyperbolic, cubic spline and polynomial up to 20th order. The functions can also handle tables containing missing and...
Platforms: Windows
License: Shareware | Cost: $20.00 USD | Size: 1.02 MB | Download (626): TriLookup Download |
NMath Analysis contains classes for function minimization, root-finding, and linear programming. Product features include classes for minimizing univariate functions using golden section search and Brent's method, minimizing multivariate functions using the downhill simplex method, Powell's...
Platforms: Windows
License: Demo | Cost: $395.00 USD | Size: 3.43 MB | Download (141): NMath Analysis Download |
LAPACK is a linear algebra library, based on LINPACK and EISPACK. LAPACK is written in Fortran77 and provides routines for solving systems of simultaneous linear equations, least-squares solutions of linear systems of equations, eigenvalue problems, and singular value problems. The associated...
Platforms: *nix
License: Freeware | Size: 10.6 MB | Download (117): LAPACK Download |
Statistics::LTU is an implementation of Linear Threshold Units. SYNOPSIS use Statistics::LTU; my $acr_ltu = new Statistics::LTU::ACR(3, 1); # 3 attributes, scaled $ltu->train([1,3,2], $LTU_PLUS); $ltu->train([-1,3,0], $LTU_MINUS); ... print "LTU looks like this:n"; $ltu->print;...
Platforms: *nix
License: Freeware | Size: 16.38 KB | Download (88): Statistics::LTU Download |
How to fit a 2D Gaussian function to noisy data in Matlab? Or data with another number of dimensions and arbitrary fit function?It took me a while to find out how Matlab does this by the functions lsqcurvefit, fmincon or fminsearch. This project demonstrates how to use these functions to fit ND...
Platforms: Matlab
License: Freeware | Size: 30.72 KB | Download (50): Nonlinear fitting n-dimensional data with arbitrary functions Download |
LOWESS- Locally Weighted Scatterplot Smoothing that does not require the statistical toolbox in matlab.This regression will work on linear and non-linear relationships between X and Y.Modifications:12/19/2008 - added upper and lower LOWESS smooths. These additional smooths show how the...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 30.72 KB | Download (41): LOWESS, Locally Weighted Scatterplot Smoothing for linear and non-linear data (enhanced) Download |
Removes nonlinear trend from dataDETRENDNONLIN Removes non-linear trend from a vector.The nonlinearity is removed by subtracting a least-squarespolynomial fit.Y = DETRENDNONLIN(X) subtracts a second order polynomial fit fromthe data vector X.Y = DETRENDNONLIN(X, n) subtracts a polynomial fit of...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (42): Detrend Non-linear Data Download |
FindGraph is a comprehensive graphing, curve fitting, and digitizing tool. FindGraph offers 12 generic fits, including linear regression, logistic functions, fourier approximation, rationals, neural networks, B-splines and parametric curves least squares approximations, plus a library of over 300...
Platforms: Windows
License: Shareware | Cost: $99.95 USD | Size: 4.33 MB | Download (621): FindGraph Download |
The Bluebit .NET Matrix Library provides classes for object-oriented linear algebra in the .NET platform.
It can be used to solve systems of simultaneous linear equations, least-squares solutions of linear systems of equations, eigenvalues and eigenvectors problems, and singular value...
Platforms: Windows
License: Commercial | Cost: $195.00 USD | Size: 2.53 MB | Download (509): .NET Matrix Library Download |