similar to: Using relevance when sorting by generated key

Olly, We currently use Sphinx for our website search function, but we're planning on using Xapian instead for a few of the extra features it has. Our website is written in Ruby on Rails, so of course we're using Xapian with Ruby bindings. I don't know if you're familiar with Sphinx but Sphinx allows you to pass a sort expression when you execute the search that will be evaluated

>A possible workaround (and perhaps a better approach) would be to >set BoolWeight as the weighting scheme, then feed in your score as >a weight using a PostingSource. Then it's available via get_weight() >on the MSetIterator object: > >https://getting-started-with-xapian.readthedocs.io/en/latest/advanced/postingsource.html > >You may find that's faster because

Hi there, I have a xapian index whose results are being sorted by a value, with (PHP bindings): $enquire->set_sort_by_value($sort_data_value); This is because I want the results returned in chronological order of publication date. However, I now have a need to have certain results be 'sticky' at the top of the resultset, regardless of their publication date. Obviously there are

Hello, this is a question that could be answered by collaborators of the Ruby bindings. Today I've played around with the Xapian::MultiValueSorter class. I've set everything up and then I tried following on an instance of Xapian::Enquire: : enquire = Xapian::Enquire.new(database) enquire.query = options[:query] : sorter = Xapian::MultiValueSorter.new sorter.add(0, true) sorter.add(1,

On Tue, Jan 23, 2018 at 12:55:31AM +0800, 张少华 wrote: > We realise our score function using PostingSource instead of using > KeyMaker, we reference your python example and source code of xapian, > the simple demo is here. > https://github.com/xiangqianzsh/xapian_leaning/blob/master/postingsource/ExternalWeightPostingSource.h I'd just put the get_weight() and get_maxweight()

Using MultiValueSorter, I can sort by key1, key2, relevance; or relevance, key1, key2. But AFAIK, I can't sort by key1, relevance, key2. Unless I spool out the entire result set or write some C++. I wonder if we need a new 'sort by' function that accepts any combination of keys and relevance in any order? The function would make it's own optimisations (ie is relevance first or

Hello all, I am very sorry I did not include xapian-devel mailing list in my previous mail. Thanks for responding my mail. Mohd Azeem NIT UK ________________________________ From: Olly Betts <olly at survex.com> To: Mohd Azeem <azeem201001 at yahoo.in> Cc: Parth Gupta <parthg.88 at gmail.com> Sent: Saturday, 31 March 2012 11:40 AM Subject: Re: GSoC, Xapian Project Weighting

On 5/2/2016 9:03 PM, Olly Betts wrote: > On Fri, Apr 22, 2016 at 12:23:15PM -0400, Alex Aminoff wrote: >> I did some digging and found a thread from 2011 talking about how to >> subclass Xapian::PostingSource in order to incorporate the date or >> recency of a document in its weighting: >> >> http://thread.gmane.org/gmane.comp.search.xapian.general/8849/focus=8856

Good afternoon I would like to ask if is possible somehow give more relevance to the recent documents in search results. I dont want to sort results according to the date, I still prefer relevance, but I would like to see recent documents with better scoring. I was trying to add search query using AND_MAYBE, which should use relevance from both subqueries, but it didnt add any benefit to the

what is the fastest way to fetch results which are sorted by timestamp ? i want to use xapian as my search engine , use add_boolean_term(something) and add_value(0,sortable_serialise(get_timestamp())) to a doc. search through enquire.set_weighting_scheme(xapian.BoolWeight()) and enquire.set_sort_by_value(0,True) to ensure that the results are sorted by the timestamp. This method is ok , but

I did some digging and found a thread from 2011 talking about how to subclass Xapian::PostingSource in order to incorporate the date or recency of a document in its weighting: http://thread.gmane.org/gmane.comp.search.xapian.general/8849/focus=8856 As in that thread, I want to be clear that I don't want to sort by date, but rather incorporate date information into the score by which I

Ok, I searched but couldn''t find anything and I even tried the RoR IRC channel with no help. I get this error: uninitialized constant Airport I used this code which I got from the RoR site. helper :sorting def list @sorter = SortingHelper::Sorter.new self, %w(icao host_id name), @params[''sort''], @params[''order''], ''icao'',

Hi guys In our implementation of Xapian for one of our sites, we index the title, subtitle, summary and table of contents of around 200,000 products on ReportBuyer.com. When we create each Xapian doc to index this information, we apply a weighting to each of these 'fields' and add these to the doc using index_text with the second parameter passing in a weighting. I've been asked if

Hi everyone, I'm Akshay, an Information Science undergrad from Bangalore. I'm interested in Information Retrieval and I'd like to contribute to Xapian as a part of GSoC and later to feed my interests. I liked the idea of adding more weighting schemes (Project #2). I did a project last semester on Document Retrieval on Hadoop using TF-IDF and Cosine Similarity (the query had to be a

(Forwarded off-list message) -------- Original Message -------- Subject: Re: [Xapian-discuss] what is the fastest way to fetch results which are sorted by timestamp ? Date: Thu, 11 Aug 2011 01:06:36 +0800 From: ??? <panjunyong at gmail.com> To: Tim Brody <tdb2 at ecs.soton.ac.uk> On Wed, Aug 10, 2011 at 6:39 PM, Tim Brody <tdb2 at ecs.soton.ac.uk> wrote: > Hi, > > In

HI, all, I am a user of Xapian, and now I have a problem in using it. After using boolean terms to get some candidates of documents (still too much), we want sorted them by self-defined function which is used in Xapian::KeyMaker->operator(). But how can I get the serialise score in Xapian::MSetIterator object. c++ code likes this: class SortKeyMaker : public Xapian::KeyMaker { std::string

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>

Hi guys, I'm trying to improve the search results of our collection by tuning the parameters in the BM25 weighting schema. Since our collection includes several databases, such as for pictures, websites, etc., I would like to use different values of the same schema to calculate the weights. Yet, rebuilding each time after the change was done to the head file seems not an optimal approach and

Hello, In order to solve that problem of sorting numerics made characters there is package stringr, functions str_sort and str_order. library(stringr) set.seed(2447) x <- sample(11L) sort(as.character(x)) [1] "1" "10" "11" "2" "3" "4" "5" "6" "7" "8" "9"

Hey guys ,Hi :) I am working on a hack which will allow the user to specify a weighing scheme (along with the parameters , if he does not not want to use the default values) to build the Eset (rather than using the hard coded TradWeight scheme with default k=1 ) as Olly had suggested that we can probably get better terms (a more relevant Eset) for query expansion if we use say something