Circle fitting using modified Coopes method by Daniel

Robust method for fitting a circle to data using Weighted Linear Least Squares. (curvature, circle, fit)

circfit( data, weights )

circfit_DEMO.m

Fit distributions to censored data by Leonidas Bantis

Fits distributions to data when left and/or right and/or interval censoring is present (censoring, left censoring, lognormal)

evfitc.m

expfitc.m

gamfitc.m

FBD - "Find the Best Distribution" tool by Yoav Aminov

With this GUI you can find the best distribution that fits your data. (fit, distributions, statistics)

FBD - Find the Best Distribution tool

Main_FitDistribution_GUI(varargin)

Plane Fitting and Normal Calculation by Dan Couture

Given a set of x,y,z coordinates, find the best planar fit. (fit, plane, normal)

fitNormal(data, show_graph)

t_fitNormal()

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)

Four-Parameter Sinefit by Marko Neitola

Least squares sinusoid fit. Optimization toolbox not needed. Data can be non-uniformly sampled. (complex, sinusoid, fit)

sinefit(varargin)

easyfitGUI by Jean-Luc Dellis

A GUI to fit data (X, Y) to a polynomial or to a model function Y = F(P,X). (gui, optimization, fit)

easyfitGUI

circle_fit by Val Schmidt

A function to fit a circle to a set of 2D points (circle, fit, mathematics)

circle_fit(x,y)

planefit by Val Schmidt

A function to fit a plane to a 3D point cloud. (plane, fit)

planefit(x,y,z)

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)

lorentzfit1 by Jered Wells

LORENTZFIT1 fits a 1-parameter Lorentzian function to data (download includes LORENTZVAL1) (lorentz, lorentzian, model)

lorentzfit1(x,y,a0)

lorentzval1(x,a)

lorentzfit2 by Jered Wells

LORENTZFIT2 fits a 2-parameter Lorentzian function to data (download includes LORENTZVAL2) (lorentz, lorentzian, model)

lorentzfit2(x,y,a0)

lorentzval2(x,a)

lorentzfit3 by Jered Wells

LORENTZFIT3 fits a 3-parameter Lorentzian function to data (LORENTZVAL3 included in download) (lorentz, lorentzian, model)

lorentzfit3(x,y,a0)

lorentzval3(x,a)

R-square: The coefficient of determination by Jered Wells

RSQUARE is a simple routine for computing R-square (coefficient of determination). (r2, fit, math)

rsquare(y,f,varargin)

fitting sum of two decaying exponentials (over damped oscillator) by Stephan Koehler

five-parameter fit to the equation A*exp(-t/T1) + B*exp( -t/T2 ) + offset (fit, overdamped oscillator)

fit_overdamping( varargin )

gapolyfitn by Richard Crozier

optimises the functional form of a multi-dimensional polynomial fit to model data (optimization, linear regression, modelling)

GenerateNewTerm(vars, maxPower, poly, maxLoops)

HasTerm(p1, p2, newTerm, vars)

PolyFitScore(polyVec, polyStruct)

circlefit3d - fit circle to three points in 3d space by Johannes Korsawe

Calculate center, radius and plane of circle that passes through three given points (circle, 3d, fit)

circlefit3d(p1,p2,p3)

polyfitn by John D'Errico

Polynomial modeling in 1 or n dimensions (polyfit, modeling, regression)

polyfitn_demo

polydern(p,diffvar)

polyfitn(indepvar,depvar,modelterms)

Fitting complex analytic laws to data by means of Genetic Algorithms by Lorenzo Luini

The script allows to easily fit predefined complex analytical laws using Genetic Algorithms (optimization, fit, analytical laws)

[coeff,RMSout]=FitLaw_GA(X,y,fh,Int,LB,UB)

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);

Least squares fit of a rectangle to a given shape/boundary by Onkar Raut

A simple method for fitting of bounding rectangle to closed regions (rectangle, fit, least squares)

fit_rectangle(boundary_points)

paramsNeurofit - import parameters from Neurofit by Cengiz Gunay

Extract Hodgkin-Huxley type ion channel parameters from a Neurofit report file. (hodgkinhuxley, voltage clamp, channel)

paramsNeurofit(file_name, props)

Sub-Sample Peak Fitting 2D by Eric

Find sub-sample location of global maximum in a 2-dimensional numerical matrix. (approximation, fit, peak)

peakfit2d(Z)

addFitLine by Rob Campbell

A convenience function to superimpose a polynomial fit to already plotted data (plotting, fit, statistics)

out=addFitLine(poolFits,modelType,lineprops,ax)

Fit experimental data is easy by Jean-Luc Dellis

pbest=easyfit(x,y) (curve, fit, optimization)

[pbest,delta_p,ybest,delta_y,chi0,exitflag,output]=easyfit(...

General Least Squares Regression by Husam Aldahiyat

Multi Dimensional Multivariable Least Squares Regression (least, squares, regression)

[fm,C9]=mreg(x,y,m)

Goodness of Fit (Modified) by Richard Crozier

Computes goodness of fit for regression model given matrix/vector of target and output values. (fit, mathematics, goodness)

gfit2(t,y,gFitMeasure,options)

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)

fitpath by Erik Newton

Gracefully truncate a file path to fit into uicontrols. (gui tools, example, uicontrol extent prop...)

fitpath(hndl, str)

demo.m

Exponential fit, without start-guess by Per Sundqvist

Fits 1) f=s1+s2*exp(-t/s3) or 2) f=s1+s2*exp(-t/s3)+s4*exp(-t/s5) to numerics, without startguess (exponential, nonlinear, initial guess)

s=exp2fit(t,f,caseval,lsq_val,options)

Ellipse Fit by Tal Hendel

Given a set of points (x, y) this function returns the best fit ellipse. (least sqaures, fit, ellipse)

ellipse_fit(x, y)

Fit logarithmic spiral to x,y data by H.J. Sommer

Fits logarithmic sprial r=a*exp(b*theta) to x,y data points. (log, logarithmic, curve)

eval_logspiral( cen );

fit_logspiral.m

Cosinor Analysis by cheart

Fits cosine curve to a time series using least squares (statistics, probability, cosinor anlaysis cosi...)

cosinor

CIcalc(X,T,Z,beta,gamma,n,sigma,Amp,phi,alpha)

fitlin by Angelini Federico

linear analythic least squares fit (fit, linear, regression)

[m,q,Sm,Sq,Rsquare,St_er]=fitlin00(X,Y,SY);

calcCircle by Peter Bone

Find the circle that passes through 3 non-collinear points. (fit, circle, three)

calcCircle(pt1, pt2, pt3)

POINTS2CIRCLE by Jos (10584)

determine the circle through 3 points (v2.0) (linear algebra, fit, circle)

points2circle(P,P2,P3)

fitgaussian by Mehmet OZTURK

fit a gaussian like curve to data (approximation, interpolation, gauss)

[f X err it]=fitgaussian(x,y,init,w)

extreme(x)

Separation Plane by Phil Larimer

Find a separation plane for two data sets (optimization, fit, separation)

separationPlane(setA, setB)

fitellipse.m by Richard Brown

Fit ellipses to 2D points using linear or nonlinear least squares (approximation, conic, least squares)

FITELLIPSE : Least squares ellipse fitting demonstration

fitellipse(x, varargin)

plotellipse(varargin)

polyfitweighted by Salman Rogers

Simple function to calculate a polynomial best fit of 1D data Y with array of weights W (which must (weighted, best, polymonial)

polyfitweighted(x,y,n,w)

Rational Polynomial curve fitting by Paul Godfrey

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

ratpolyfit(x,y,kn,kd)

Padefit by Paul Godfrey

Rational polynomial fitting (approximation, interpolation, pade)

padefit(num,den,kn,kd)

fitplot by Andrew Bliss

Adds a linear fit to each data series in a plot (annotation, customization, fitplot)

fitplot(varargin)

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]...

Akima Interpolation by N. Shamsundar

Interpolate smooth curve through given points on a plane. (akima, spline, fit)

yi=akimai(x,y,xi)

AkimaTst.m

click_fit by Nassim Khaled

You can now choose some arbitrary points by using the mouse, and fit a curve on the top of your ... (fit, click, curve)

[p]=click_fit(nb_data_pts,order_poly,xmin,xmax,ymin,ymax)

fitgauss by James Blake

Fits one Gaussian curve to data. (fit, gaussian, square)

fitgauss(yk, xk, guess_A, guess_mu, guess_sigma)

Goodness of Fit by Durga Lal Shrestha

Computes goodness of fit (model performance) for regression. (model performance, goodness, fit)

gfit(t,y,varargin)

BIPVAL by Vassili Pastushenko

Produces a matrix of user-defined size, as bipolynomial values. (approximation, interpolation, bipolynomial)

VAL=bipval(BIP,ROWCOL)

SURFIT by Vassili Pastushenko

Approximation of a matrix via an optimal bipolynomial of user-defined orders. (approximation, surface, polynomial)

BAS=surfit(D,ORDVER,ORDHOR)