Hello Fernando, The naive bayes approach makes the assumption that your features are independent, if your featurea have a high correlation, naive bayes won't be a good choice.
I would advice you to try the neural networks (mlp), it can get a better decision surface than logistic regression... Best. Lucas. On Dec 7, 2013 6:53 PM, "Fernando Santos" <[email protected]> wrote: > Hello Suneel, > > I want to check if any better performance is reached with SVM. > > I've been using naive bayes, but my data is quite unbalanced and therefore > I'm getting pretty bad results with it. I also tried the complementary > naive bayes, but got the same bad results. I read about this difference > between NaiveBayes performance of Weka and Mahout implementations and maybe > that's the cause ( > > http://mail-archives.apache.org/mod_mbox/mahout-user/201109.mbox/%3ccabdaxxijtfv9nhqxxpyd72rrsv-h60ps13h0pund2injx70...@mail.gmail.com%3E > ). > > I also tried logistic regression and got around 77% accuracy. So maybe with > SVM it could be better. > > > 2013/12/7 Suneel Marthi <[email protected]> > > > Any specific reasons u r looking for an SVM implementation only? > > R u sure that those patches r still relevant given the codebase today? > > > > > > > > > > > > On Saturday, December 7, 2013 2:58 PM, Fernando Santos < > > [email protected]> wrote: > > > > Thanks Manuel. > > > > It seems that these two ( > https://issues.apache.org/jira/browse/MAHOUT-334 > > and https://issues.apache.org/jira/browse/MAHOUT-232) patches might > work, > > although not in parallel. > > > > Does anyone has sucessfully used any of these two patches already and > could > > share some comments about it? > > > > Thanks > > > > > > 2013/12/6 Manuel Blechschmidt <[email protected]> > > > > > Hi Fernando, > > > there are some patches and some discussions: > > > > > > SVM: > > > https://issues.apache.org/jira/browse/MAHOUT-334 > > > https://issues.apache.org/jira/browse/MAHOUT-232 > > > https://issues.apache.org/jira/browse/MAHOUT-14 > > > https://issues.apache.org/jira/browse/MAHOUT-227 > > > > > > /Manuel > > > > > > On 06.12.2013, at 19:14, Fernando Santos wrote: > > > > > > > Hello, > > > > > > > > Is there any tested SVM implementation for Mahout? > > > > > > > > Mahout in action says there is a sequential implementation, but > > > > "Experimental still". I couldn't find this implementation. > > > > > > > > Thanks > > > > > > > > -- > > > > Fernando Santos > > > > +55 61 8129 8505 > > > > > > -- > > > Manuel Blechschmidt > > > M.Sc. IT Systems Engineering > > > Dortustr. 57 > > > 14467 Potsdam > > > Mobil: 0173/6322621 > > > Twitter: http://twitter.com/Manuel_B > > > > > > > > > > > > > > -- > > Fernando Santos > > +55 61 8129 8505 > > > > > > -- > Fernando Santos > +55 61 8129 8505 >
