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Questions tagged [lenskit]

LensKit is an open source toolkit for building and researching recommender systems.

LensKit is an open-source toolkit for building, researching, and studying recommender systems. It was initiated by GroupLens Research at the University of Minnesota

Resources

34 questions
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Service provider design pattern

I am looking for some explanation or reference info on the service provider design pattern as i came across this while studying the Grapht @defaultImplementation code…
Rookie
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LensKit: Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec (default-cli)

I am building a maven project in Netbeans using LensKit recommender, but when I try to run a groovy file I get the following error: [exec:exec] Exception in thread "main" groovy.lang.MissingPropertyException: No such property: config for class:…
Omen
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LensKit Recommender only returns results for some users, otherwise returns empty DataFrame. Why is this happening?

I am trying to implement a group recommender system with the Django framework, using the LensKit tools for Python (specifically a Recommender object which adapts the UserUser algorithm). However, it only returns individual recommendations in some…
Irina Mon
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LensKit recommendation without rating

I try to implement a recommendation engine with LensKit 3.0 in a Java webapp for an ecommerce website. I would like to generate recommendations for a given user according to purchase history, therefore I only have implicit events of 'buy' and…
mumsza
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Lenskit: FunkSVD

I need to slightly change FunkSVD algorithm. Basically, I just need to replace FunkSVDUpdater, but it turned out that FunkSVDUpdater as well as FunkSVDUpdateRule are final classes, which means I cannot extend them. My solution is to copy FunkSVD…
Random1251
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use Lenskit to predicate the book rating

I have a "csv " file which contains the user id, the book he/she has read, the rating for each book. I want to use Lenskit to predict a book rating for a user. For example, the user A has read 3 books,A,B,C, I want to predicate the rating for the…
user3369592
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lenskit maven build 'failed to execute goal' error message

I would like to be able to use LensKit - from within Eclipse (Kepler) - to explore its basic capabilities. When building a maven project, however, I am getting the following error message: Failed to execute goal…
dave
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Lenskit: what is channel, side channel, typed side channel

As the title. I do not understand the concept of channel, side channel and typed side channel in the Lenskit source code. Can anyone give me a brief explanation? Thanks.
xin_cucs
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Rscript error using Lenskit / Maven / Eclipse / Mac osx 10.8.4

I set up Lenskit, Maven and Eclipse. When testing to see if Lenskit works, I get a "Build Failure" stating the following: java.io.IOException: Cannot run program "Rscript": error=2, No such file or directory Does have anybody had the same issue?…
Julian Jakob
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Exception in thread "main" java.lang.NoSuchMethodError in Lenskit for Java

I am researching with Lenskit for Java, I wanna load file with CSV file. I using TextEntitySource to load source but I got error. import java.io.File; import java.io.IOException; import org.lenskit.data.dao.file.TextEntitySource; public class…
Drake Nguyen
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trouble using lenskit with conda

I am using lenskit to make a rec sys for the first time. I followed the lenskit getting started tutorial, but when I used pip there were runtime issues. I am now trying to use conda instead(as lenskit suggests), but have run into an issue. Conda…
Hanna
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Use lenskit to recommend for user not in dataset

I try lenskit to build a recommendation system but in tutorial I only can get recommmend for user in dataset. I want to build a model and get recommend for a user that send an array of what he like. How can I do that? Sorry for my bad English.
Duong Nhat
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How to test only relevant items and remove popular items from test whit Crossfold in Lenskit 3.0-M2

How can I configure the crossfold task to generate test sets only with relevant items. That is, with rating values higher than the average rating of the user and do not consider the popular items? Is it posible with lenskit-3.0?
Carlos Rios
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Lenskit: How to add ratings from arraylist to EvenCollectionDao?

I am trying to add the static ratings to EventCollectionDao: List rs = new ArrayList<>(); rs.add(org.grouplens.lenskit.data.event.Ratings.make(1, 2, 3)); EventCollectionDAO dao = new EventCollectionDAO(rs); But it yields this…
theNoobProgrammer
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Connecting lenskit 3.0 data access model to jdbc

I am building a recommender engine for our ecommerce application. The easiest way is to deploy the recommender system to java web server and implement a REST API for it. I am trying to get the data from the database directly, but I didn't find any…
Mohd Alomar
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