Curve Fitting Toolbox™

Product Overview

Major Features

Curve Fitting Toolbox™ software is a collection of graphical user interfaces (GUIs) and M-file functions that operate in the MATLAB^® technical computing environment. The toolbox supplements MATLAB features with:

• Data preprocessing capabilities, such as sectioning, excluding data, and smoothing

• Data fitting using parametric and nonparametric models:

  • The toolbox includes a library of parametric models, with polynomials, exponentials, rationals, sums of Gaussians, Fourier polynomials, and many others.

  • You can also define custom models to precisely reflect the goals of your data analysis.

  • Nonparametric models are available through a variety of smoothers and interpolants.

• Fitting methods for linear least squares, nonlinear least squares, weighted least squares, constrained least squares, and robust fitting are available

• Data and fit statistics to assist you in analyzing your models

• Postprocessing capabilities that allow you to interpolate, extrapolate, differentiate, and integrate the fit

• The ability to save your work in various formats, including workspace variables, binary files, and automatically generated MATLAB code

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Interactive and Programmatic Environments

Curve Fitting Toolbox software allows you to work in two different environments:

• An interactive environment, Curve Fitting Tool, which is composed of multiple graphical user interfaces

• A programmatic environment that allows you to write object-oriented MATLAB code using curve fitting methods

To open Curve Fitting Tool, type

cftool

To list the Curve Fitting Toolbox functions for use in MATLAB programming, type

help curvefit

The code for any function can be opened in the MATLAB Editor by typing

edit function_name

Brief, command line help for any function is available by typing

help function_name

Complete documentation for any function is available by typing

doc function_name

You can change the way any toolbox function works by copying and renaming its M-file, examining your copy in the editor, and then modifying it.

You can also extend the toolbox by adding your own M-files, or by using your code in combination with functions from other toolboxes, such as Statistics Toolbox™ or Optimization Toolbox™ software.

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Getting Started

Interactive Curve Fitting