2012

Non-asymptotic Oracle Inequalities for the Lasso and Group Lasso in high dimensional logistic model

Kwemou, Marius

Understand

We consider the problem of estimating a function $f\_{0}$ in logistic regression model.

  • We propose to estimate this function $f\_{0}$ by a sparse approximation build as a linear combination of elements of a given dictionary of $p$ functions.
  • This sparse approximation is selected by the Lasso or Group Lasso procedure.
  • In this context, we state non asymptotic oracle inequalities for Lasso and Group Lasso under restricted eigenvalues assumption as introduced in \cite{BRT}.

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