Just test out libsvm against log regression on a sample of your data to get an understanding of upside downside for your particular problem
Sent from my iPhone > On 24 Dec 2013, at 15:55, Tharindu Rusira <[email protected]> wrote: > > Thanks all for the words of wisdom :) , > > @Ted, I'm coming from a text mining background. Many text books recommend > SVM because of its impressive performance with vectors having a larger > cardinality which is the usual case when dealing with text documents. Do > you think logistic regression would perform as good as SVM for text mining > applications? > > Thanks > > > On Tue, Dec 24, 2013 at 3:47 PM, unmesha sreeveni > <[email protected]>wrote: > >> You can paralize svm using same equations (which has slight difference) >> explained in >> >> http://books.google.co.in/books/about/DATA_MINING.html?id=IYc2muhCbmEC&redir_esc=y >> >> But i dont gaurentee about the performance. for some 100 MB data it takes >> 10 min to train the data. >> >> >>> On Tue, Dec 24, 2013 at 3:30 PM, tuku <[email protected]> wrote: >>> >>> someone tried to implement SVM in a summer google code but it turns out >> map >>> reduced version of svm is too difficult to implement and they dropped the >>> project. >>> I bet you can train via libsvm and use just classification part with map >>> reduce but if I have a choice I prefer logistic regression too >> ~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~ >>> If you don't know where you're going, any road will get you there >>> "Not all those who wander are lost." - J.R.R. Tolkien >>> "Fish don't know they're in water." >>> "Smile, breathe and go slowly." - Thich Nhat Hanh, Zen Buddhist monk >>> "Zamanlarını para kazanmak ve saklamakla geçirenler, sonunda, en çok >>> istediklerinin satın alınamayacak şeyler olduğunu anlarlar." >>> "And in the end, it's not the years in your life that count. It's the >> life >>> in your years." >>> "in 20 years, you will be more dissapointed by what you didn't do than >> what >>> you did." >>> "If you want to go fast, go alone. If you want to go far, go with >> others." >>> "Remember, happiness is a way of travel not a destination" >>> "A good traveller has no fixed plans, and is not intent on arriving." >>> >>> >>>> On 24 December 2013 11:11, Ted Dunning <[email protected]> wrote: >>>> >>>> You might try logistic regression with regularization for a very >> similar >>>> result. >>>> >>>> >>>> On Mon, Dec 23, 2013 at 11:57 PM, Sebastian Schelter < >>>> [email protected]> wrote: >>>> >>>>> Hi Tharindu, >>>>> >>>>> There is no SVM implementation in an official release. >>>>> >>>>> --sebastian >>>>> >>>>>> On 24.12.2013 08:02, Tharindu Rusira wrote: >>>>>> Hi all, >>>>>> Do we have a SVM implementation in Mahout(either sequential or >>>>> mapreduce)? >>>>>> I was searching in JIRA and MAHOUT-14[1] proposes a SVM >>> implementation >>>>> and >>>>>> also MAHOUT-334, MAHOUT-232 have patches available for SVM. >>>>>> Are these codes available in any Mahout release? Because the >> comments >>>> in >>>>>> these issues suggest otherwise. >>>>>> >>>>>> [1] >> https://issues.apache.org/jira/browse/MAHOUT-14?jql=project%20%3D%20MAHOUT%20AND%20text%20~%20%22svm%22 >>>>>> [2] >> https://issues.apache.org/jira/browse/MAHOUT-334?jql=project%20%3D%20MAHOUT%20AND%20text%20~%20%22svm%22 >>>>>> [3] >> https://issues.apache.org/jira/browse/MAHOUT-232?jql=project%20%3D%20MAHOUT%20AND%20text%20~%20%22svm%22 >>>>>> >>>>>> Thanks, >> >> >> >> -- >> *Thanks & Regards* >> >> Unmesha Sreeveni U.B >> >> *Junior Developer* >> http://www.unmeshasreeveni.blogspot.in/ > > > > -- > M.P. Tharindu Rusira Kumara > > Department of Computer Science and Engineering, > University of Moratuwa, > Sri Lanka. > +94757033733 > www.tharindu-rusira.blogspot.com
