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Questions tagged [mahout-recommender]

A collaborative filtering engine takes users' preferences for items and returns estimated preferences for other items.

Mahout provides a rich set of components from which you can construct a customized recommender system from a selection of algorithms. Mahout is designed to be enterprise-ready; it's designed for performance, scalability and flexibility.

See Mahout Recommender Documentation

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Order of Apache Mahout User-Based Recommender Results is non-deterministic

Currently, I am implementing the user-based recommender system from Mahout, see http://mahout.apache.org/users/recommender/userbased-5-minutes.html Initially, I thought I can implement some kind of pagination: Users query for the first page and get…
akohout
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The output of Mahout spark-itemsimilarity and its indicators

The output of Mahout (0.11.1) spark-itemsimilarity looks like: 3705021559 3705021558:241.35418715327978 3705021546:163.6168323904276 By my understanding, its format is: (item)tab(item1:score)tab(item2:score), item1, item2, itemx... are so called…
Stephen Kuo
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How can I speed up below program's execution?

Below is the code for user recommendations using mahout. DataModel dm = new FileDataModel(new File(inputFile)); UserSimilarity sim = new LogLikelihoodSimilarity(dm); UserNeighborhood neighborhood = new NearestNUserNeighborhood(100, sim, …
dhirajforyou
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Adding new methods to the Apache mahout

I am trying to do some work and research on recommender systems. I want to use Apache Mahout. However, I want to add some methods as there is no implementations for them now. I tried to do that but the source code of Mahout is locked and I cannot…
HimanAB
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Use Cosine Similarity with Binary Data - Mahout

I have a boolean/binary where a customer and product id are found when the customer actually bought the product and not found if the customer did not buy it. The dataset represented like this: Dataset I have tried different approaches like…
user2255207
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Error while running Mahout recomendItembased algorithm

I was trying to use the recomendItembased algorithm in Mahout but got stuck with an error. Your guidance would help a lot. I downloaded the Cloudera CDH 5.4 VM and was running this on it. I created the following sample file in the directory 'input'…
Karthik Ganapathy
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issue with Fetching data from Neo4j into the Mahout Data Model

I am trying to implement a recommender using Mahout. My source database is a Neo4j graph database and I am able to fetch {userId,itemId,rates} values from it. However I do not know how to feed this input to Mahout to create a DataModel. Should I…
Lina
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Clustering or recommender?

I am currently working on a concept for an matching algorithm based on huge amount of data. And it's my first time. That's the case: we've got X objects of type "House" with features like size, location and so on we have people looking for houses,…
Dennis Ruske
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elasticsearch integration with mahout

I would like to use Mahout to do some predictive analysis on data stored in elasticsearch to find similar documents or to recommend other records based on records that have been tagged with certain criteria. I plan to create a Mahout cluster,…
A Dev
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FileNotFountException for intro.csv in mahout userbased Collaborative filtering recommendation

I created a maven project and in the pom file I added the following dependency org.apache.mahout mahout-mr 0.11.0 I followed the…
user3747092
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Mahout Recommender - questions to setup user preference

I'm looking for some advice / guidance -- I'm working on a recommendation engine / personnel assistance app, using Mahout as the framework - What I want to do is for new users of the app to begin by answering 5 questions and use the answers from the…
Didier Jean Charles
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Java Heap Size Error

i am basically building a movie reccomendation system with apache mahout, but i am using a 540MB dataset which occurs this problem in execution Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded . .etc.. . Picked…
Kaan Baris Bayrak
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Too small RMSE. Recommender systems

Sorry, I'am newbie at recommender systems, but i wrote few lines of code using apache mahout lib. Well, my dataset is pretty small, 500x100 with 8102 cells known. So, my dataset is actually a subset of Yelp dataset from "Yelp business rating…
luckyfish
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How do I create recommendation system to show unread items?

I want to build Recommendation system using Java. Whenever I request for recommendations, it should give n unread items for the user. I tried creating Mahout User based recommendation. However, when program is done executing, it just removes all…
LakshmiNarayana
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Strange predictions using SVD in mahout

I'm trying to build svdrecommender using mahout. Code is simple: DataModel model = new FileDataModel(new File("C:\\data.csv")); SVDRecommender recommender = new SVDRecommender(model, new SVDPlusPlusFactorizer(model, 10, 20)); All my ratings are…
Osmin
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