I think this is the one. Yes, I don't see this paper referenced in the code sorry about that. http://leon.bottou.org/publications/pdf/compstat-2010.pdf
On Monday, January 13, 2014 3:51 PM, Frank Scholten <fr...@frankscholten.nl> wrote: Do you know which paper it is? He has quite a few publications. I don't see any mention of one of his papers in the code. I only see www.eecs.tufts.edu/~dsculley/papers/combined-ranking-and-regression.pdf in MixedGradient but this is something different. On Mon, Jan 13, 2014 at 1:27 PM, Suneel Marthi <suneel_mar...@yahoo.com>wrote: > Mahout's impl is based off of Leon Bottou's paper on this subject. I > don't gave the link handy but it's referenced in the code or try google > search > > Sent from my iPhone > > > On Jan 13, 2014, at 7:14 AM, Frank Scholten <fr...@frankscholten.nl> > wrote: > > > > Hi, > > > > I followed the Coursera Machine Learning course quite a while ago and I > am > > trying to find out how Mahout implements the Logistic Regression cost > > function in the code surrounding AbstractOnlineLogisticRegression. > > > > I am looking at the train method in AbstractOnlineLogisticRegression and > I > > see online gradient descent step where the beta matrix is updated but to > me > > its unclear how matches with the cost function described at: > > http://www.holehouse.org/mlclass/06_Logistic_Regression.html > > > > Perhaps Mahout uses an optimized approach for that does not directly map > > into the formula at that link? > > > > Cheers, > > > > Frank >
