search for: questletor

...oing through all resources and papers mentioned on the project page. 3. Generating lcov test coverage reports. 4. Going through code in current master of xapian-letor and understanding all functionalities. Following are the things on which I am currently working on: 1. Modifying xapian-letor/bin/questletor.cc to use and test core features and API of letor. The current version of questletor.cc has a lot of unusable and broken functions and is custom made for training with INEX 2010 dataset. The intention is to make it usable for a user provided database. Currently I am using xapian-docsprint/data/100-...

...prepare_training_data instead. (We can benefit from inheritance of ranker in training part just like in ranking part) 2. There is one thing I have to confirm: once we have the training model (like model file of SVMRanker), we won?t train that model again in general. (The behavior of questletor.cc under bin/ confuses me) 3. Since RankList will be removed, according to the meeting last week, its related information will be stored under MSet::Internal. My plan is to create new class under MSet::Internal. That class will have two kinds of feature vectors: normalized one and unnor...

...aving a final count of 44 IR specific features apart from those learnt by unsupervised feature learning part via Deep Learning. So I am left with 7 out of those 44,of which 6 I will be implementing within the next 2 days(before 22nd). This patch also contains a 1 line change to xapian-core/examples/questletor.cc correcting the usage of the questletor file. I will send in another patch as soon as I am done with those 6 features. Best regards, Rishabh. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.xapian.org/pipermail/xapian-devel/attachments/20120419/e7...

Hi Parth, I?ve implemented SVMRanker class and also sorted out most of current Letor APIs. Now I?m trying to use INEX dataset to verify my implement. But I stuck in the indexing part. You said in the documentation that we have to add prefix when indexing. Also I notice that you set some metadata in omindex.cc of your version. But the omindex.cc has changed since 2011. I think that?s why my result

Hi Rishabh, I think its better not to expose RankiList to Letor.h and make it better user friendly. So my suggestion is to convert RankList to the following statement in this method. std::map<Xapian::docid, double> letor_score(const Xapian::MSet & mset); So just convert the RankList in std::map<Xapian::docid, double> format in the methods where you need to return. Parth. On

...omindex.cc it was modified as can be seen > here<http://trac.xapian.org/browser/svn/branches/gsoc2011-parth/xapian-applications/omega/omindex.cc>on > line 838 and block 1532-1559. > > But now we have the same as xapian-letor/bin/xapian-letor-update.cc so > before starting with questletor.cc you need to run it once for each db and > in this case all you need to make sure is below line in omindex.cc while > indexing. > > indexer.index_text(title, 1,"S"); On current trunk, we index the title with prefix "S" by default in omindex, though with a wdf in...

Hello Rishabh, As per our previous discussion, we will talk each week now about the project. Please update the timeline/todo/journal accordingly so that we can check the status on this saturday for this week. Please remember that this half of the programme is smaller and hence we would need to be very punctual about the goals. Regards, Parth. -------------- next part -------------- An HTML

...model with the use of training file, and writes the model into a model file which can be used to rank the document. double learn_score() - Here we may calculate the score of the document using the model file with the generated vector. Flow of the program: We have to make a quest like utility say questletor, here we will get the initial ranklist in MSet. Now for each document we will get the feature values. Calculation of this features may be placed in the learn_score() method or there can be an independent method like make_feature_vector() output of which can be passed to learn_score() method. This m...

Hello guys, I have an weight value which is calculated by some factor and i need to add the weight with the relevancy value of a result and sort it with that value is that possible in xapian. Thanks, VishnuKumar -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.xapian.org/pipermail/xapian-devel/attachments/20130302/9831e287/attachment-0001.html>