similar to: Introduction and Discussion for Learning to Rank Framework

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

Hi~ Manu I was glad to see you were interested in Xapian, especially the learning to rank project. There are two branch in my repo. The one named gsoc2014 is followed the thought of Parth's work in which we not assign the test set for each ranking and in another one gsoc2014-evaluation we assign the training set and test set explicitly so that we can get the evaluation score of each ranking

> > > > The approach I was thinking would look something like this: > > * instead of Features, which is really a namespace implemented as a > class, we separate out the calculation of the different features > into distinct subclasses of Feature, whose only job is to calculate > a single feature. Currently the FeatureManager calls these (via >

Hi all, Thank you for giving me the opportunity to work with Xapian :) I am Jiarong Wei, a third year undergraduate student in Zhejiang University, China. In GSoC 2014, I will work on Letor module with Hanxiao Sun. Here are some questions I encountered these days, 1. In letor.cc, we have two parts of functions: the training part and the ranking part. I?ll use SVMRanker as an example. The

Hello, I applied to letor stabilisation project for gsoc. I'd like to use coming weeks to improve the workability of xapian-letor. For that, I'm planning to refactor code in current master and begin writing some tests for it. Before adding tests, I think it would be better if xapian-letor could be made consistent with how xapian-core is written. For that, I'd first like to

Hi, I've read the code of letor module. And I have some questions about it: 1. In https://github.com/rishabhmehrotra/xapian/blob/master/xapian-letor/letor_internal.cc#L299, there is a write_to_file method, which save RankList into ?train.txt?. But the format for ?train.txt? is different from the one mentioned in http://trac.xapian.org/wiki/GSoC2011/LTR/Notes#QueryLevelNorm. And in

Thanks for your reply! For the third question: In https://inex.mmci.uni-saarland.de/data/documentcollection.jsp, I can find inex2010-article.qrels in 2010 assessment, but can?t find query files. Could you send me the link? I have registered on INEX website. And I also need to download ``INEX 2009 collection without annotation tags: (unofficial)`` on

Hi guys, I want to transfer the following code from R into .Call compatible form. How can i do that? Thanks!!! INT sim; for(i in 1:sim){ if(i>2) genemat <- genemat[,sample(1:ncol(genemat))] ranklist[,1] <- apply(genemat, 1, function(x){ (mean(x[cols]) - mean(x[-cols]))/sd(x)}) ranklist <- ranklist[order(ranklist[,1]),]

> You could do that by identifying the search session instead of the user, > which makes it closer to what we need than to something that might trip you > into privacy concerns. Okay, that would be much better. :) > Third records some information about what sort of query it is — add, > morelike or a plain query. Last provides the estimated match size and then > the HTTP

On Thu, Dec 04, 2014 at 08:28:32PM -0500, Manu Gupta wrote: > I was trying to build Han's code and was stuck here. It seems to me that > his code is trying to generate pdf for them. > > Is it possible to modify the make files to stop building the documentation. You can run the top-level configure with --disable-documentation. Cheers, Olly

Hi, Before starting my proposal, I wanted to know what is the expected output of Letor module. Is it for transfer learning (i.e you learn from one dataset and leverage it to predict the rankings of other dataset) or is it for supervised learning? For instance - Xapian currently powers the Gmane search which is by default based on BM25 weighting scheme and now suppose we want to use LETOR to rank

Hello all, Here goes one of my first functions. I want to make a nonparametric multiple sample comparison with unequal sample sizes (see Zar?s Biostatistical Analysis, 3rd. Ed., pg. 201 Example 10.11, pg. 288 Example 11.10). In the real world, I want to compare samples of fish length captured with different fishing gears. After using the Kruskal-Wallis test I want to check the differences

Hi all, While building from git with xapian-letor not ignored in bootstrap, I am getting the following make error: In function `main': /home/ayush/Desktop/xapian/xapian-letor/bin/xapian-letor-update.cc:98: undefined reference to `Xapian::Internal::str(unsigned int)' /home/ayush/Desktop/xapian/xapian-letor/bin/xapian-letor-update.cc:99: undefined reference to

1.Could you explain why are these libraries included in all the xapian-letor headers? #include<xapian/intrusive_ptr.h> #include<xapian/types.h> #include<xapian/visibility.h> Or just provide me with the documentation of these header. I looked into these header files but couldn't anything substantial. 2.

Hi I am on Debian verson 7.7, GCC 4.7.2 and make 3.8.1. I cloned the code : git clone https://github.com/v-hasu/xapian git checkout gsoc2014-evaluation rm xapian-letor/nobootstrap ./bootstrap ./configure --no-documentation make CXXFLAGS='-w' and I get a different set of errors --- ranker.cc: In member function 'std::string Xapian::Ranker::get_cwd()': ranker.cc:80:36: error:

Hi, Sorry for the long hiatus. I was caught with some other deadlines. Could some one tell me some specific expectations from Letor for GSOC 2015? I am currently trying out some learning algorithm implementations but need some help with it. Can Parth, James and others related to LETOR please tell me the IRC availability for the next few days. Regards Karthik On Wed, Oct 22, 2014 at 3:39 AM,

Hi, I am Jiarong Wei (irc: VcamX). I?m a 3rd year computer science student at Zhejiang University, China. I?m very willing to contribute to Xapian as part of GSoC 2014. Now I?m at Simon Fraser University, Canada, as an exchange student. I?ll go back to China on the end of April. I think it doesn?t matter I?ll change the time zone :) From the list of project?s ideas, Learning to Rank interests me

On Tue, Mar 11, 2014 at 12:02:15PM +0100, Parth Gupta wrote: > During the indexing with omindex, only you need to make sure is indexing > with prefix 'S' for title as explained here in Letor documentation: > xapian-letor/docs/letor.rst > > Previously when I edited omindex.cc it was modified as can be seen >

Just to add on top of what Olly has already mentioned. > > Now, I'm reading the resources provided on ideas' page. Do you have > > any other suggestions of knowing more about the letor? > > And I'd like to test the function of letor. But I can't find code > > example. Can u give me some suggestions? > > Hopefully Parth can help here. > In order

Hello, I'm Ayush from New Delhi, India. I am interested in Letor Stabilisation project for GSoC. I have a good background in machine learning. Sorry for getting in so late, university exams were holding me back. I'll try to cover as much as I can in the coming week. I am following the plan of attack suggested on the project page. Following are the things that I have completed: 1.