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Research Associate, FNRS, Belgium.

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...2001)

See also http://www.eso.org/outreach/press-rel/pr-2001/pr-07-01.html

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... width

In the regression problem, the Nadaraya-Watson estimator (Nadaraya 1964; Watson 1964) is commonly used:

$$g(x) = \frac{\displaystyle \sum_{n=1}^N{g(X_n) K(\frac{x-X_n}{h})}} {\displaystyle \sum_{n=1}^N{K(\frac{x-X_n}{h})}}\cdot$$

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