Abstract
The goal of this thesis is to contribute to the domain of statistical learning, and includes the development of methods that can deal with functional data. In the first section, we develop a Nearest Neighbor approach for functional regression. In the second, we study the properties of a quantization method in infinitely-dimensional spaces. We then apply this approach to a behavioral study of schools of anchovies. The last section is dedicated to the problem of estimating level sets of the regression function in a multivariate context.