User`s guide

1
Getting Started with the
Curve Fitting Toolbox
This chapter describes a particular example in detail to help you get started with the Curve Fitting
Toolbox. In this example, you will fit census data to several toolbox library models, find the best fit,
and extrapolate the best fit to predict the US population in future years. In doing so, the basic steps
involved in any curve fitting scenario are illustrated. These steps include
Opening the Curve Fitting
Tool (p. 1-2)
The Curve Fitting Tool is the main toolbox interface.
Importing the Data (p. 1-3) The data must exist as vectors in the MATLAB workspace. After
importing, you can view the data, mark data points to be excluded
from the fit, and smooth the data.
Fitting the Data (p. 1-5) Explore various parametric and nonparametric fits, and compare fit
results graphically and numerically.
Analyzing the Fit (p. 1-15) Evaluate (interpolate or extrapolate), differentiate, or integrate the fit.
Saving Your Work (p. 1-17) Save your work for documentation purposes or for later analysis.