\documentclass[12pt]{book}

\input{../../header}

\lstset{inputpath=../code}
\graphicspath{{figures/}}

\typein[\pagenumber]{Number of first page}
\typein[\chapternumber]{Chapter number}
\setcounter{page}{\pagenumber}
\setcounter{chapter}{\chapternumber}

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\begin{document} 

\input{regression}

Example for fit with matlab functions lsqcurvefit, polyfit

Example for overfitting with polyfit of a high order (=number of data points)

\end{document}