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Line 5: ==Formal definition== ~~Given~~Suppose we are given a regression function ''&fnof;'' yielding for each ''y<sub>i</sub>'', 1 ≤ ''i'' ≤ ''N'', an estimate <math>\widehat{y}_i = f(x_i)</math>, wewhere <math>x_i</math> is the vector of the ''i''<sup>th</sup> observations on all the explanatory variables. We have: :<math>\begin{align}

Fraction of variance unexplained: Difference between revisions