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[MAHOUT-355] Misleading JavaDoc comment in FPGrowth - Mahout - [issue]
...The JavaDoc for org.apache.mahout.fpm.pfpgrowth.fpgrowth.FPGrowth.generateTopKFrequentPatterns(...) states that if the parameter returnableFeatures is null then patterns for every frequent i...
http://issues.apache.org/jira/browse/MAHOUT-355    Author: Sebastian Schelter , 2015-03-31, 22:49
[MAHOUT-362] Computation of pairwise cosine similarities for Item-Based Collaborative Filtering - Mahout - [issue]
...Provides a map/reduce job to precompute the pairwise cosine similarities between the item vectors of the user-item-matrix.  The code uses a slightly modified version of the algorithm su...
http://issues.apache.org/jira/browse/MAHOUT-362    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-367] IllegalArgumentException in AbstractJDBCModel when requesting mostSimilarItems for an item without preferences - Mahout - [issue]
...I'm using GenericItemBasedRecommender together with MySQLJDBCDataModel for generating recommendations for an online shop. Whenever the recommender tries to calculate the most similar items f...
http://issues.apache.org/jira/browse/MAHOUT-367    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-386] org.apache.mahout.cf.taste.hadoop.pseudo.RecommenderJob breaks when no usersFile is supplied - Mahout - [issue]
...When one tries to run org.apache.mahout.cf.taste.hadoop.pseudo.RecommenderJob without a usersFile (the file containing the userIDs to generate recommendations for) it throws an Exception in ...
http://issues.apache.org/jira/browse/MAHOUT-386    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-387] Cosine item similarity implementation - Mahout - [issue]
...I needed to compute the cosine similarity between two items when running org.apache.mahout.cf.taste.hadoop.pseudo.RecommenderJob, I couldn't find an implementation (did I overlook it maybe?)...
http://issues.apache.org/jira/browse/MAHOUT-387    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-389] UncenteredCosineSimilarity - Mahout - [issue]
...org.apache.mahout.cf.taste.impl.similarity.UncenteredCosineSimilarity only computes the cosine distance between those components of the vectors where both vectors have a value greater zero.T...
http://issues.apache.org/jira/browse/MAHOUT-389    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-393] Distributed item similarity functions - Mahout - [issue]
...To complete the work started in MAHOUT-389, I've created a distributed version of any item similarity function that is currently already available in a non-distributed manner. An additional ...
http://issues.apache.org/jira/browse/MAHOUT-393    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-406] Inconsistent return values of different ItemSimilarity implementations - Mahout - [issue]
...org.apache.mahout.cf.taste.impl.similarity.GenericItemSimilarity returns Double.NaN if you request the similarity for two itemIDs it doesn't know, while  org.apache.mahout.cf.taste.impl...
http://issues.apache.org/jira/browse/MAHOUT-406    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-407] Limit the number of similar items per item in the ItemSimilarityJob - Mahout - [issue]
...In order to keep the item-similarity-matrix sparse, it would be a useful improvement to add an option like "maxSimilaritiesPerItem" to o.a.m.cf.taste.hadoop.similarity.item.ItemSimilarityJob...
http://issues.apache.org/jira/browse/MAHOUT-407    Author: Sebastian Schelter , 2010-10-31, 15:49
[MAHOUT-411] Configurable reload interval in FileDataModel - Mahout - [issue]
...Patch to enable the following usecase: all preferences are kept in a text file and loaded via a FileDataModel at some point in time the text file is completely overwritten with more recent p...
http://issues.apache.org/jira/browse/MAHOUT-411    Author: Sebastian Schelter , 2010-10-31, 15:49