15.3.8 Fit Comparison

OriginPro's fit comparison tools make it easy for you to compare models or compare data:

Comparing Models to One Dataset

OriginPro provides two tools to help user find the best model for his data.

  • Rank Models
  • Compare Models


Please look at the comparison of these two tools as below

Rank Models Compare Models
Support MULTIPLE models Support only TWO models
Fit and compare models in the same tool Require fitting report first
Compare functions in one category Can compare functions in different category, or between different tools
Only support default fitting options Support customized fitting options such as fix parameter, concatenate fit ect
Support user-defined model Support user-defined model

Fit and rank multiple functions in a category

The Rank Models tool in OriginPro can fit and rank multiple functions to a dataset. The fit results can be ranked by either Akaike (AIC) or Bayesian Information Criterion (BIC), to determine the best fitting model for your data.

NLFitCompModel 03.png
To perform the Rank Models operation
  • Choose Analysis: Fitting: Rank Models from Origin menu

or

  • Type funcrank -d in the Script Window

Compare two fitting models to one dataset

The Compare Models tool helps to user to decide which model works better with your data

NLFitCompModel 01.png NLFitCompModel 02.png
To perform the Compare Model operation
  1. Perform fitting twice using two different fitting functions for the same fitting data, and create two fitting reports.
  2. Select Analysis: Fitting: Compare Models from Origin menu.

Comparing two datasets with one fitting model

If you want to evaluate which data better fits a particular model, you can use Compare Datasets tool:

Fitcomparedata 01.png
Fitcomparedata 02.png
To perform the Compare Model operation
  1. Perform fitting on two different datasets, using the same fitting function, and create two fitting reports.
  2. Select Analysis: Fitting: Compare Datasets from Origin menu.


Topics covered in this section: