User`s guide

What Is the Curve Fitting Toolbox?
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You can explore the graphical environment by typing
cftool
Click the GUI Help buttons to learn how to proceed. Additionally, you can
follow the examples in the tutorial sections of this guide, which are all GUI
oriented.
To explore the command line environment, you can list the toolbox functions by
typing
help curvefit
To view the code for any function, type
type function_name
To view the help for any function, type
help function_name
You can change the way any toolbox function works by copying and renaming
the M-file, and then modifying your copy. However, these changes will not be
reflected in the graphical environment.
You can also extend the toolbox by adding your own M-files, or by using it in
combination with other products such as the Statistics Toolbox or the
Optimization Toolbox.