Module dictionary_learning 

DictionaryLearning — sparse dictionary learning à la Mairal-Bach- Ponce-Sapiro (2009). Alternating scheme:

1. Fix the dictionary D, solve LASSO for the sparse codes α.
2. Fix the codes, update D column-wise via a projected gradient step that renormalises to the unit ball.

Structs

DictionaryLearning

Fitted DictionaryLearning.