Fri, 18 Nov 2011 ⊕Category: scikit-learn
#bug #omp #orthogonal matching pursuit #dictionary learning #scikit-learn

A while back, Bob L. Sturm blogged about a similar implementation of OMP to the one in scikit-learn. Instead of using the Cholesky decomposition like we did, his Matlab code uses the QR decomposition, to a similar (or maybe even identical) outcome, in theory. So lucky that Alejandro pointed out …

Mon, 19 Sep 2011 ⊕Category: scikit-learn
#dictionary learning #scikit-learn

Thanks to Olivier, Gaël and Alex, who reviewed the code heavily the last couple of days, and with apologies for my lack of activity during a sequence of conferences, Dictionary learning has officially been merged into scikit-learn master, and just in time for the new scikit-learn 0.9 release. Here …

Thu, 11 Aug 2011 ⊕Category: scikit-learn
#blas #efficient #lapack #numpy #omp #orthogonal matching pursuit #potrs #scipy #dictionary learning #python #scikit-learn

EDIT: There was a bug in the final version of the code presented here. It is fixed now, for its backstory, check out my blog post on it.

When we last saw our hero, he was fighting with the dreaded implementation of least-angle regression, knowing full well that it was …