Discrete Orthogonal Polynomial Toolbox: DOPBox Version 1.4 by Matthew Harker, Paul O'Leary,

A toolbox for discrete orthogonal polynomials and their applications to fitting, ODEs etc. (discrete orthogonal p..., polynomial approximat..., fitting)

[R Q]=rq(A)

circulant( noPoints, coeffs, option);

dop( m, n )

Table Breakpoint Optimization by Tucker McClure

A set of tools for finding the best way to reduce the size of a table. (optimization, breakpoints, tables)

Table Optimizer

find_best_table_1d(x_0, z_0, ...

find_best_table_1de(...

Multiple curve fitting with common parameters using NLINFIT by Chen

Wrapper for NLINFIT which allows simultaneous fitting for multiple data sets with shared parameters. (fitting, multiple, nonlinear)

nlinmultifit(x_cell, y_cell, mdl_cell, beta0, options)

Nadaraya-Watson smoothing by Jan Motl

A non-parametrical regression (smoothing) tool using Gaussian kernel. (estimation, parameterless, smooth)

[smoothed score h]=smoothing(ydata,varargin)

fitmethis by Francisco de Castro

FITMETHIS finds best-fitting distribution to data vector (fitting, best fit, maximum likelihood)

fitmethis(data,varargin)

plotfitdist(data,distname,par,dtype,varargin)

Fitting Harmonic Potential by Francois Dion

This is a simple function for Harmonic Potential Fitting (harmonic oscillator, fitting)

fit_harm(R,POT)

polyfitcon by Murat

polynomial fitting with an optional constraint (can be set as a local extrema) (polynomial fitting, fitting, fmincon)

[pfunc,pval]=polyfitcon(x,y,n,xc,yc,p0,isLocExt)

EzyFit 2.41 by Frederic Moisy

A free curve fitting toolbox for Matlab (curve, nonlinear, approximation)

Discover Ezyfit: A free curve fitting toolbox for Matlab

about_ef (Ezyfit Toolbox)

axis0 (Ezyfit Toolbox)

Free-knot spline approximation by Bruno Luong

Least squares approximation of 1D data using free-knots spline (bspline, free knots, fitting)

BBspline(varargin)

BSFK(x, y, k, nknots, fixknots, options)

BSFK_install

Lorentzian fit by Jered Wells

LORENTZFIT fits a single- or multi-parameter Lorentzian function to data (lorentz, fit, lorentzian)

lorentzfit(x,y,p0,bounds,nparams)

Weighted Nonlinear Curve Fit Script with Plotter by Jannick

This curve fitting script calculates best guess and errors using data with y-error. Plot see preview (fitting, nonlinear fitting, weighted nonlinear fi...)

paramtext(fitstr,c,cerr,nr,c2doF,Q,strings)

wnonlinfit(x,y,yerr,func,beta0,varargin)

example.m

fitting critically damped simple harmonic oscillator by Stephan Koehler

Four-parameter fit to the equation A*(1 + t/T2).*exp(-t/T1) + offset (fitting, harmonic oscillator)

fit_critical_damping( varargin )

fitting decaying oscillations by Stephan Koehler

From inputs t, y the best fit to the decaying oscillation is determined. (signal processing, fitting)

fit_decay_oscillations( varargin )

polyfitn by John D'Errico

Polynomial modeling in 1 or n dimensions (polynomial, curve, regression)

polyfitn_demo

polydern(p,diffvar)

polyfitn(indepvar,depvar,modelterms)

Orthogonal Linear Regression in 3D-space by using Principal Components Analysis by Ivo Petras

Orthogonal Linear Regression by using PCA (fitting, pca, orthogonal regression)

fit_3D_data(XData, YData, ZData, geometry, visualization, s...

2D Line Curvature and Normals by Dirk-Jan Kroon

Accurate Curvature and Normals of a line/contour consisting of 2D points (curvature, curves, vertices)

N=LineNormals2D(Vertices,Lines)

k=LineCurvature2D(Vertices,Lines)

gaussian mix fit of multiple connected ellipses by Georg D

processes image data containing connected ellipses. we try to fit a gaussian mixture to ellipses. (image processing, ellipse, fitting)

exampleFindEllipses

fitMixGauss(xyData,nrgaussians,param,plotresult,replicates,...

imageToData(img)

Smoothing 2D Contours Using Local Regression Lines by Tolga Birdal

This submission contains both the implementation and the test function for 2D contour smoothing. (smoothing, contour processing, chain codes)

test_smooth_contours()

quantreg.m - quantile regression by Aslak Grinsted

Quantile regression with bootstrapping confidence intervals (percentile, robust fitting, median)

[p,stats]=quantreg(x,y,tau,order,Nboot);

ZfitGUI(varargin) fits and simulates impedance data by Jean-Luc Dellis

ZfitGUI helps to identify a right model of complex data. (capacitance, gui, model)

ZfitGUI(varargin)

polyfit3 by Antoni J. Canós

Fit polynomial to data, with new features as forced to zero coefficients and data weighting. (fitting, polynomial fitting, approximation)

polyfit3(x,y,n,nul,w)

Power Law, Exponential and Logarithmic Fit by Jonathan C. Lansey

Finds and plots the linear fit to some data points when plotted on a log scale. (power law, exponential, curve fitting)

logfit(x,y,varargin)

AdvCurveFit by Robert Bemis

Solve complex curve fit problem with parameter pooling & stratification by nonlinear least-squares. (optimization, curve, fitting)

Adventures in curve fitting

PkBgErr(x,y,pk,bg)

[x,y]=limits(a)

Ellipsoid fit by Yury Petrov

Fits an ellipsoid to data using linear least squares. (ellipsoid, fitting, least squares)

ellipsoid_fit( X, flag, equals )

test_ellipsoid_fit.m

cubic Bezier least square fitting by Dr. Murtaza Khan

Approximation of data using cubic Bezier curve least square fitting (approximation, interpolation, cubic)

FindBezierControlPointsND(p,varargin)

Q=bezierInterp(P0,P1,P2,P3,varargin)

[MatGlobalInterp]=BezierInterpCPMatSegVec(p0mat,p1mat,p2mat...

MATLAB(R) for Excel Users by Dan Doherty

Demo files from MATLAB for Excel Users webinar (excel, statistics, link)

checkmotor(rpm, motordata)

createfigure(x1, y1, y2)

dockfigures.m

MATLAB in Physics - Data Analysis by Matt McDonnell

The second lecture in a series on using MATLAB in undergraduate physics courses. (demo, lecture, physics)

[binEdges,N]=decayHistogram(decayTimes,varargin)

generateDecayData(sampleTime,sampleCount,halfLife,relativeA...

pendulumDE(tVals,omega0,startAngle)

3D Least squares polynomial fit in x and y by Thomas

Fit a two dimensional f(x,y) polynomial to sampled x,y,z data triplets (fitting, least squares, signal processing)

coeff=least_square_polyfit_xyz(x,y,z,m)

fitting by morteza ahmadi

fitting with any function (fitting, amirkabir, function)

n_fit.m

Straight-line fitting genetic algorithm by Evaristo Rojas Mayoral

It uses a genetic algorithm for straight-line fitting. (fitting, genetic algorithm, straightline)

ag_recta(x,y)

Tidal fitting toolbox by Aslak Grinsted

fit tidal components to an observed series of sea level and use them for prediction (tidal model, tides, sea level)

ArgStruct=parseArgs(args,ArgStruct,varargin)

dispmtx(M,varargin)

tidal=tidalfit(data,varargin)

gridtrimesh by Willie Brink

Fits a square grid surface of the form z = f(x,y) to a triangular mesh surface. (face, grid, fitting)

gridtrimesh(F,V,X,Y)

demonstration.m

Rational Polynomial curve fitting by Paul Godfrey

Fits a function to a quotient of polynomials (approximation, fit, rational)

ratpolyfit(x,y,kn,kd)

Builder for Excel Demo: Curve Fitting by Amit Jain

Shows how to compile a MATLAB function that performs curve fitting into an Excel add-in (external interface, matlab, excel)

excelfitdemo(t,y)

fitfun(lambda,t,y,handle)

GUI for Generalized Nonlinear Non-analytic Chi-Square Fitting by Nathaniel Brahms

Provides a Curve Fitting Toolbox-like interface for chi-square fitting (optimization, chisquare, nonlinear)

FitChiTool(varargin)

ModelEditor(varargin)

[params,dParams,gof,stddev]...

NNLS and constrained regression by Rasmus Bro

M-files for non-negativity constrained least squares regression. (nonnegativity, constrained, nnls)

fnnls(XtX,Xty,tol)

fnnlsb(XtX,Xty,P_old,Z_old,tol)

COM Builder Demo: Curve Fitting by Amit Jain

Shows how to compile a MATLAB function that performs curve fitting into a generic COM object. (external interface, builder example, com)

fitdemo(XData, YData)

fitfun(lambda,t,y,handle)

uifit by Jean-Michel Rousseau

A GUI which uses fmins matlab core function "fmins" to fit data with any function. (optimization, fmins, fminsearch)

Spec1d by Emmanuel Farhi

1-D data visualisation and fitting. (optimization, fitting, 2dplotting)

chi_squared.m by Mike Scarpulla

Returns chi^2 given data and a fit (approximation, interpolation, fitting)

chi_squared(y,fit,P,eb)

polyfit0.m by Arthur Jutan

Polyfit0 - similar to polyfit, except that the fitted polynomial does not have a constant term. (fitting, polynomial, polyfit)

polyfit0(x,y,n)