Surface fitting techniques are used in many scientific fields, including spectroscopy, mathematics, electrical engineering, and earth sciences.
Choose from 19 different surface fitting models including Gauss2D, DoseReponse2D, Exponential2D, and Polynomial2D, or define your own function.
Features
Origin's NLFit tool provides an intuitive interface for fitting your XYZ or matrix data to a surface model.
- Fit XYZ or matrix data from a worksheet or graph.
- Locate multiple peaks in your surface data using one of many peak identification methods.
- Fit multiple peaks using automatic peak parameter value initialization.
- Fitter uses the Levenberg-Marquardt iterative algorithm.
- Choose from 19 different surface fitting models or define your own function
- View Formula, Sample Curve, and Function File in preview tab to quickly select the function you need.
- Use the Hints, Messages, and Residual tabs to step you through the fitting process to control the fit.
- Apply constraints and bounds to parameters, as well as easily fix desired parameters.
- Choose from a multitude of parameter and statistical results, as well as residual curves for output.
- Find specific Z values along the fit surface and include them in your output.
- Overlay the surface with the original data points as a scatter plot.
- Output tabular, as well as graphical results.
Origin includes the ability to automatically recalculate the analysis results of the NLFit Surface Fitting operation any time you change the parameters or update your source data. In addition, the settings for this analysis routine can be saved to an analysis theme for use later with similar data.
