Linear Least Squares Fit
Among the considerations in the use of analysis of regression, outliers or bad values can seriously disturb the least-squares fit. They falls far from the line implied by the rest of the data. If these points are really outliers, then the estimate of the intercept may be incorrect and the...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (46): regout Download |
Statistics::LineFit module least squares line fit, weighted or unweighted. SYNOPSIS use Statistics::LineFit; $lineFit = Statistics::LineFit->new(); $lineFit->setData (@xValues, @yValues) or die "Invalid data"; ($intercept, $slope) = $lineFit->coefficients(); defined $intercept or die...
Platforms: *nix
License: Freeware | Size: 24.58 KB | Download (128): Statistics::LineFit Download |
Statistics::GaussHelmert is a general weighted least squares estimation module. SYNOPSIS use Statistics::GaussHelmert; # create an empty model my $estimation = new Statistics::GaussHelmert; # setup the model given observations $y, covariance matrices # $Sigma_yy, an initial guess $b0...
Platforms: *nix
License: Freeware | Size: 13.31 KB | Download (123): Statistics::GaussHelmert Download |
Statistics::OLS is a Perl module to perform ordinary least squares and associated statistics. SYNOPSIS use Statistics::OLS; my $ls = Statistics::OLS->new(); $ls->setData (@xydataset) or die( $ls->error() ); $ls->setData (@xdataset, @ydataset); $ls->regress(); my ($intercept, $slope)...
Platforms: *nix
License: Freeware | Size: 8.19 KB | Download (96): Statistics::OLS Download |
The function LMFsolve.m serves for finding optimal solution of an overdetermined system of nonlinear equations in the least-squares sense. The standard Levenberg- Marquardt algorithm was modified by Fletcher and coded in FORTRAN many years ago. LMFsolve is its essentially shortened version...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (45): LMFsolve.m: Levenberg-Marquardt-Fletcher algorithm for nonlinear least squares problems Download |
The function The LMFnlsq.m serves for finding optimal solution of an overdetermined system of nonlinear equations in the least-squares sense. The standard Levenberg- Marquardt algorithm was modified by Fletcher and coded in FORTRAN many years ago (see the Reference). This version of LMFnlsq is...
Platforms: Matlab
License: Freeware | Size: 870.4 KB | Download (46): LMFnlsq - Solution of nonlinear least squares Download |
POLYFIT_ROOTS Least-squares polynomial fit to data.[R,K] = POLYFIT_ROOTS(X, Y, N, TOL) finds the roots R and constant K so that the polynomial P(s) = K*(s-R(1))*(s-R(2))* ... *(s-R(N)) is the best least-squares fit to the data Y at points X.Argument TOL bounds the accuracy of the fit, and if...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 81.92 KB | Download (47): polyfit_roots Download |
Performs linear regression using the Least Squares method. Determines the regression coefficients, the generalized correlation coefficient and the standard error of estimate. Does multivariate regression. Displays 2D and 3D plots.
Platforms: Windows
License: Shareware | Cost: $15.00 USD | Size: 1.71 MB | Download (215): Linear Regression Download |
PDL::Fit::Levmar is a Perl module with Levenberg-Marquardt fit/optimization routines. Levenberg-Marquardt routines for least-squares fit to functions non-linear in fit parameters. This module provides a PDL ( PDL::PDL ) interface to the non-linear fitting library levmar (written in C). Levmar...
Platforms: *nix
License: Freeware | Size: 122.88 KB | Download (104): PDL::Fit::Levmar Download |
DMFitter ActiveX control allows you to add sophisticated regression analysis tools to your software in a few lines of code. Features include: both linear and nonlinear (Levenberg-Marquardt) least squares curve fitting algorithms, arbitrary user models (defined analytically or by string...
Platforms: Windows
License: Freeware | Size: 368.64 KB | Download (46): DMFitter ActiveX control Download |
It needs a set of 3D points, equal radii constraints and orientation constraint to fit an ellipsoid into a 3D block object
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (48): Ellipsoid fit Script Download |
zpkfit uses the nonlinear least-squares fitter (lsqnonlin) to fit an analytic model of any (fixed) number of poles and zeroes to numerical (presumably measured) frequency response data. It takes as arguments a frequency vector, a frequency response vector, and vectors of the initial guesses of...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (43): zpkfit Download |
Cosinor analysis uses the least squares method to fit a sine wave to a time series. Cosinor analysis is often used in the analysis of biologic time series that demonstrate predictible rhythms. This method can be used with an unequally spaced time series. Follows cosinor analysis of a time series...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 20.48 KB | Download (63): Cosinor Analysis Download |
The zip includes:(1) lsqAffineSpace: a 'low level' routine that takes a set of m-dimensional real sample data and returns the optimal-fit k-dimensional affine subspace, with some options for discarding outliers.(2) lsqPlane and lsqLine: lsqAffineSpace wrappers, that compute optimal line and...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (48): Least-Squares optimal affine subspace Download |
This program can be used to fit pKa values to pH dependent data where the data titrates from one value to another e.g. ppm data, absorbance data, fluorescence data, Ki and Km data etc. This program fits and plots data to the equations:- If one pKa only Sobs=S1(1+K1/H)+S2/(1+H/K1) or...
Platforms: Mac
License: Commercial | Cost: $0.00 USD | Size: 1.7 MB | Download (39): ppmfit Download |
This is a wrapper function to solve optimization problems (using FMINCON) of the form:min w.r.t. X of CostFunc(X) = beta*(W_ls*F(X)) + (1 - beta)*(max(W_mm*F(X)))subject to: A*X
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (48): weighted least-squares + weighted min-max optimization Download |
4 files are included in the package:(1) fs01.m - the 1st-order local linear approximation (LLA) very similar to algorithm by Farmer and Sidorowich (1987). Uses constrained linear least squares (lsqlin) and(2) ts1.m - to reconstruct the vectors of the state space.(3) Example.m - runs fs01 and ts1...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (39): Constrained LLA to predict a chaotic time series Download |
M-files for unimodality (or monotonically) constrained least squares regression.
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (39): Unimodal regression Download |
The design matrix of a GPS network is established for any kind of least squares adjustment, namely;-free (trace minimum),-minimum constrained,-over-determined.The user can adapt easily dmgps to the adjustment problem of a GPS network whose baselines are taken as observations. Moreover, it can be...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (50): dmgps Download |
The Unscrambler® is the complete multivariate analysis and experimental design software, equipped with powerful methods including Principal Component Analysis (PCA), Multivariate Curve Resolution (MCR), Partial Least Squares Regression (PLS-R), 3-Way PLS Regression, K-Means Clustering and SIMCA...
Platforms: Windows
License: Shareware | Cost: $0.00 USD | Size: 29.31 MB | Download (664): The Unscrambler Download |