Origin File Exchange
Fitting Function Library
Fitting Function Library

App

11 Ratings

11 Comments

708 Downloads (90 Days)

Min.Version: 2019 (9.6) Updated on: 6/17/2026

Let Origin user search, find and add fitting functions to Origin.

Piecewise Peak Fitting
Piecewise Peak Fitting

App

0 Ratings

0 Comments

324 Downloads (90 Days)

Min.Version: 2025b (10.25) Updated on: 6/13/2025

Fit Multiple Peaks on the Curve with Individual Baseline Settings

Neural Network Fitting
Neural Network Fitting

App

19 Ratings

19 Comments

174 Downloads (90 Days)

Min.Version: 2020 (9.7) Updated on: 2/21/2025

Fit data with neural network.

Raman Peak Studio
Raman Peak Studio

App

1 Ratings

1 Comments

18 Downloads (90 Days)

Min.Version: 2026 (10.3) Updated on: 7/8/2026

Drag-and-drop Raman peak fitting: BWF/asymmetric lineshapes, arPLS baselines, AIC/BIC/F-test model selection, bootstrap CIs, two-zone carbon workflow, and Origin export.

Simple Fit
Simple Fit

App

59 Ratings

59 Comments

858 Downloads (90 Days)

Min.Version: 2022b (9.95) Updated on: 6/17/2026

A simplified tool to perform curve fitting.

Speedy Fit
Speedy Fit

App

14 Ratings

14 Comments

597 Downloads (90 Days)

Min.Version: 2022b (9.95) Updated on: 6/17/2026

Perform batch fitting fast

Cyclic Voltammetry
Cyclic Voltammetry

App

23 Ratings

23 Comments

463 Downloads (90 Days)

Min.Version: 2025b (10.25) Updated on: 6/17/2026

Perform multi-peak fitting and integration of cyclic data.

Piecewise Fit
Piecewise Fit

App

19 Ratings

19 Comments

462 Downloads (90 Days)

Min.Version: 2020 (9.7) Updated on: 6/12/2025

Fit two or three segments of a data plot with same or different fitting function.

2D Peak Analysis
2D Peak Analysis

App

6 Ratings

6 Comments

279 Downloads (90 Days)

Min.Version: 2020 (9.7) Updated on: 6/12/2025

Perform 2d peak fitting and integration for each peak.

Fit Convolution
Fit Convolution

App

19 Ratings

19 Comments

191 Downloads (90 Days)

Min.Version: 2018b (9.55) Updated on: 6/12/2025

Perform convolution of the fitting function with the instrument response while performing the fitting.

Neural Network Regression
Neural Network Regression

App

10 Ratings

10 Comments

281 Downloads (90 Days)

Min.Version: 2022b (9.95) Updated on: 2/21/2025

Perform neural network fitting using Python.

OPJ Packer
OPJ Packer

App

1 Ratings

1 Comments

43 Downloads (90 Days)

Min.Version: 2018b (9.55) Updated on: 8/5/2024

Pack project file including fitting functions and templates

Sequential Fit
Sequential Fit

App

14 Ratings

14 Comments

381 Downloads (90 Days)

Min.Version: 2020 (9.7) Updated on: 4/25/2023

Perform fitting on all datasets in a worksheet sequentially.

Rank Models
Rank Models

App

12 Ratings

12 Comments

146 Downloads (90 Days)

Min.Version: 2022b (9.95) Updated on: 1/4/2022

Fit and rank multiple functions to identify best fitting model.

Fit with Composite Functions
Fit with Composite Functions

App

1 Ratings

1 Comments

44 Downloads (90 Days)

Min.Version: 2019 (9.6) Updated on: 11/17/2021

Perform fitting by combining two or more existing fitting functions

Rank Models by Fit Reports
Rank Models by Fit Reports

App

0 Ratings

0 Comments

45 Downloads (90 Days)

Min.Version: 2021 (9.8) Updated on: 3/16/2021

Rank multiple fitting functions by their fit reports.

Fit Adsorption Isotherm
Fit Adsorption Isotherm

App

10 Ratings

10 Comments

105 Downloads (90 Days)

Min.Version: 2020b (9.75) Updated on: 6/9/2020

Help to transform raw data related to adsorption isotherm into a linear dataset then perform linear fitting.

Stability Study
Stability Study

App

0 Ratings

0 Comments

27 Downloads (90 Days)

Min.Version: 2026b (10.35) Updated on: 6/17/2026

Create a custom worksheet for stability study data collection, and analyze the stability of a product to predict its shelf life.

Predictive Modeling Advisor
Predictive Modeling Advisor

App

0 Ratings

0 Comments

11 Downloads (90 Days)

Min.Version: 2026b (10.35) Updated on: 6/17/2026

Help to determine the appropriate predictive modeling/tool/App.

Compare Linear Fit Parameters and Datasets
Compare Linear Fit Parameters and Datasets

App

10 Ratings

10 Comments

135 Downloads (90 Days)

Min.Version: 2016 (9.3) Updated on: 6/17/2026

Compare datasets using a linear model, or compare intercept and slope.

Enzyme Kinetics
Enzyme Kinetics

App

4 Ratings

4 Comments

101 Downloads (90 Days)

Min.Version: 2026b (10.35) Updated on: 6/17/2026

Fit enzyme kinetics data and rank models.

Standard Curve Analysis
Standard Curve Analysis

App

2 Ratings

2 Comments

165 Downloads (90 Days)

Min.Version: 2024 (10.1) Updated on: 6/17/2026

Fit a standard curve and interpolate x values.

Linear Mixed Effects Model
Linear Mixed Effects Model

App

11 Ratings

11 Comments

753 Downloads (90 Days)

Min.Version: 2025b (10.25) Updated on: 6/17/2026

Fit a linear model with fixed effects and random effects.

Compare Datasets and Fit Parameters
Compare Datasets and Fit Parameters

App

4 Ratings

4 Comments

82 Downloads (90 Days)

Min.Version: 2020 (9.7) Updated on: 6/17/2026

Compare parameters across multiple datasets, or compare multiple datasets using a nonlinear model.

Fit Parameter Test
Fit Parameter Test

App

0 Ratings

0 Comments

77 Downloads (90 Days)

Min.Version: 2019 (9.6) Updated on: 6/17/2026

Test for a specific value of a fit parameter

General Linear Regression
General Linear Regression

App

7 Ratings

7 Comments

795 Downloads (90 Days)

Min.Version: 2026b (10.35) Updated on: 6/17/2026

Perform regression to study the relationship between a response variable and categorical or continuous independent variables.

Polynomial Surface Fit
Polynomial Surface Fit

App

6 Ratings

6 Comments

144 Downloads (90 Days)

Min.Version: 2016 (9.3) Updated on: 4/22/2025

Fit XYZ data with polynomial equations of specified/maximum degree in X and Y, and rank equations to determine best fit (PRO Only).

Radiometric Geochronology Analysis
Radiometric Geochronology Analysis

App

4 Ratings

4 Comments

102 Downloads (90 Days)

Min.Version: 2022b (9.95) Updated on: 4/7/2025

Analyze radiometric geochronological data.

Chebyshev Polynomial Fit
Chebyshev Polynomial Fit

App

0 Ratings

0 Comments

44 Downloads (90 Days)

Min.Version: 2019 (9.6) Updated on: 8/21/2024

Determine the coefficients of Chebyshev polynomials of the first kind.

Generalized Linear Mixed Model
Generalized Linear Mixed Model

App

1 Ratings

1 Comments

146 Downloads (90 Days)

Min.Version: 2023b (10.05) Updated on: 7/2/2024

Fit a generalized linear model with fixed effects and random effects.

Peak Deconvolution
Peak Deconvolution

App

36 Ratings

36 Comments

922 Downloads (90 Days)

Min.Version: 2019 (9.6) Updated on: 4/12/2024

Offer an intuitive and interactive interface to perform peak analysis.

Bayesian Ridge Regression
Bayesian Ridge Regression

App

1 Ratings

1 Comments

75 Downloads (90 Days)

Min.Version: 2023b (10.05) Updated on: 4/10/2024

Perform bayesian ridge regression with Python.

Generalized Additive Model
Generalized Additive Model

App

0 Ratings

0 Comments

101 Downloads (90 Days)

Min.Version: 2024 (10.1) Updated on: 1/11/2024

Fit a generalized linear model with spline functions of predictor variables.

Quantile Regression
Quantile Regression

App

5 Ratings

5 Comments

84 Downloads (90 Days)

Min.Version: 2020 (9.7) Updated on: 4/25/2023

Explore the relation between continuous or categorical independent variables and specified quantiles of a dependent variable.

Pulse Fit
Pulse Fit

App

0 Ratings

0 Comments

66 Downloads (90 Days)

Min.Version: 2023 (10.0) Updated on: 11/4/2022

Fit a series of pulses.

Fit ODE
Fit ODE

App

9 Ratings

9 Comments

63 Downloads (90 Days)

Min.Version: 2019b (9.65) Updated on: 6/27/2022

Fit ordinary differential equation

Global Fit with Multiple Functions
Global Fit with Multiple Functions

App

6 Ratings

6 Comments

98 Downloads (90 Days)

Min.Version: 2019 (9.6) Updated on: 4/25/2022

Perform global fit and share parameters for different functions.

Linear Regression with Marginal Distribution
Linear Regression with Marginal Distribution

App

7 Ratings

7 Comments

102 Downloads (90 Days)

Min.Version: 2020b (9.75) Updated on: 4/27/2020

Linear regression with marginal distribution

Operations Manager
Operations Manager

App

0 Ratings

0 Comments

28 Downloads (90 Days)

Min.Version: 2018 (9.5) Updated on: 8/2/2019

View and manage a list of operations (analyses, etc) in the current project.

Global Peak Fit
Global Peak Fit

App

19 Ratings

19 Comments

166 Downloads (90 Days)

Min.Version: 2018 (9.5) Updated on: 12/18/2017

Fit multiple peaks in multiple datasets with parameter sharing.

Composite Spectrum Regression
Composite Spectrum Regression

App

5 Ratings

5 Comments

76 Downloads (90 Days)

Min.Version: 2018 (9.5) Updated on: 9/26/2017

Perform multiple linear regression for spectra.

Constrained Multiple Regression
Constrained Multiple Regression

App

1 Ratings

1 Comments

80 Downloads (90 Days)

Min.Version: 2018 (9.5) Updated on: 5/8/2017

Perform constrained multiple regression and solve constrained linear least-squares problems (PRO Only).

Weibull Fit with Least Squares Method
Weibull Fit with Least Squares Method

App

0 Ratings

0 Comments

70 Downloads (90 Days)

Min.Version: 2017 (9.4) Updated on: 1/20/2017

Perform Weibull fit using rank regression on X

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