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2 Regression Fitness Assessment

Fitness for the Regression problem instances is determined by summing the squared difference between the target value for each $x$ value. In Chapter 5, fitness is reported as ``adjusted fitness'', where this is defined by the following equation:

\begin{displaymath}
\textrm{adjusted fitness} = \frac{1}{1 + \textrm{fitness}}.
\end{displaymath}



S Gustafson 2004-05-20