temp/preparePreferenceMatrix/ratingMatrix has data looks like it's similarity between items... I'm confused. How can I get item similarity?
2014-07-21 23:48 GMT+04:00 Serega Sheypak <[email protected]>: > The code snippet: > > @Test//(enabled = false) > void testReadAll(){ > (0..5).each { > > def pathToFile = new Path('matrixSim/part-r-0000$it") > println pathToFile > def reader = new SequenceFile.Reader(new Configuration(), > SequenceFile.Reader.file(pathToFile)); > IntWritable key = new IntWritable(); > VectorWritable value = new VectorWritable(); > while(reader.next(key, value)){ > def itr = value.get().iterateNonZero() > while(itr.hasNext()){ > println itr.next() > } > } > reader.close(); > } > } > > > 2014-07-21 23:46 GMT+04:00 Serega Sheypak <[email protected]>: > > I've parsed it via java, matrix is empty. why? >> >> >> 2014-07-21 22:41 GMT+04:00 Serega Sheypak <[email protected]>: >> >> 0.7-cdh4.7.0 >>> Anyway, recommenditembased does produce these catalogs: >>> >>> /recommenditembased/temp/maxValues.bin >>> /recommenditembased/temp/norms.bin >>> /recommenditembased/temp/numNonZeroEntries.bin >>> /recommenditembased/temp/pairwiseSimilarity >>> /recommenditembased/temp/partialMultiply >>> /recommenditembased/temp/prePartialMultiply1 >>> /recommenditembased/temp/prePartialMultiply2 >>> /recommenditembased/temp/preparePreferenceMatrix >>> /recommenditembased/temp/similarityMatrix >>> /recommenditembased/temp/weights >>> >>> I suppose that "/recommenditembased/temp/similarityMatrix" is the thing >>> In eed. Right now I try to read it using >>> >>> matrix = LOAD '/recommenditembased/temp/similarityMatrix' USING >>> com.twitter.elephantbird.pig.load.SequenceFileLoader( >>> '-c com.twitter.elephantbird.pig.util.IntWritableConverter', >>> '-c com.twitter.elephantbird.pig.mahout.VectorWritableConverter' >>> ) as (intId: int, vector:tuple(cardinality:int, >>> entries:bag{t:tuple(some_id:long, some_value:double)})); >>> >>> >>> Looks like the vector is empty... Or i do something wrong. >>> >>> >>> >>> 2014-07-21 22:09 GMT+04:00 Ted Dunning <[email protected]>: >>> >>> Which version of Mahout? >>>> >>>> >>>> On Mon, Jul 21, 2014 at 11:05 AM, Serega Sheypak < >>>> [email protected]> >>>> wrote: >>>> >>>> > Hi, I've tried: Unexpected --outputPathForSimilarityMatrix while >>>> processing >>>> > Job-Specific >>>> > >>>> > sudo -u hdfs hadoop fs -rm -r >>>> hdfs://nameservice1/recommenditembased/output >>>> > sudo -u hdfs hadoop fs -rm -r >>>> hdfs://nameservice1/recommenditembased/temp >>>> > sudo -u oozie mahout recommenditembased \ >>>> > --input \ >>>> > >>>> > >>>> > >>>> hdfs://nameservice1/user/hive/warehouse/staging_weighted_visits_and_rec_clicks >>>> > \ >>>> > --output \ >>>> > hdfs://nameservice1/recommenditembased/output \ >>>> > --similarityClassname \ >>>> > SIMILARITY_LOGLIKELIHOOD \ >>>> > --numRecommendations \ >>>> > 500 \ >>>> > --booleanData \ >>>> > false \ >>>> > --maxPrefsPerUser \ >>>> > 1000 \ >>>> > --maxSimilaritiesPerItem \ >>>> > 1000 \ >>>> > --minPrefsPerUser \ >>>> > 5 \ >>>> > --maxPrefsPerUserInItemSimilarity \ >>>> > 30 \ >>>> > --threshold \ >>>> > 1.1 \ >>>> > --tempDir \ >>>> > hdfs://nameservice1/recommenditembased/temp \ >>>> > --outputPathForSimilarityMatrix \ >>>> > hdfs://nameservice1/recommenditembased/sim_matrix >>>> > >>>> > >>>> > I'm on Cloudera cdh 4.7, looks like this feature is not supported. >>>> > >>>> > >>>> > 2014-07-21 11:18 GMT+04:00 Peng Zhang <[email protected]>: >>>> > >>>> > > Serega, >>>> > > >>>> > > See the last line on how to pass outputPathForSimilarityMatrix >>>> options to >>>> > > the recommenditembased command: >>>> > > >>>> > > sudo -u oozie mahout recommenditembased \ >>>> > > --input visited_items_with_inverted_items \ >>>> > > >>>> > > --output result \ >>>> > > --similarityClassname SIMILARITY_LOGLIKELIHOOD \ >>>> > > --usersFile inverted_items \ >>>> > > --numRecommendations 500 \ >>>> > > --booleanData false \ >>>> > > --maxPrefsPerUser 100 \ >>>> > > --maxSimilaritiesPerItem 500 \ >>>> > > --minPrefsPerUser 0\ >>>> > > --maxPrefsPerUserInItemSimilarity 30 \ >>>> > > --threshold 0.91 \ >>>> > > --tempDir temp \ >>>> > > --outputPathForSimilarityMatrix similarityMatri \ >>>> > > >>>> > > >>>> > > Peng Zhang >>>> > > [email protected] >>>> > > >>>> > > >>>> > > >>>> > > >>>> > > >>>> > > On Jul 21, 2014, at 3:09 PM, Serega Sheypak < >>>> [email protected]> >>>> > > wrote: >>>> > > >>>> > > > I've inspected the code, our approach wouldn't work with >>>> > > booleanData=false. >>>> > > > We do calcualte imte similarity in the wrong way...((( >>>> > > > Thank you >>>> > > > 1. We provide "fake" user_id and provide --usersFile in order to >>>> get >>>> > > > recommendations for "fake user_id, where user_id is a negative >>>> item_id. >>>> > > It >>>> > > > worked when we did provide user_id->item_id pairs without >>>> preference. >>>> > > > 2. Our target is to get item similarities. We tried >>>> > > > >>>> org.apache.mahout.cf.taste.hadoop.similarity.item.ItemSimilarityJob but >>>> > > it >>>> > > > returns bad result comparing to RecommenderJob with our "fake" >>>> user_id >>>> > > > (inverted item_id) >>>> > > > >>>> > > > 1. I'll try the option you provided. >>>> > > > 2. I will remove input with fake user_id and usersFile with these >>>> fake >>>> > > ids >>>> > > > >>>> > > > 3. >>>> > > > >>>> > > >>>> > >>>> https://github.com/apache/mahout/blob/master/mrlegacy/src/main/java/org/apache/mahout/cf/taste/hadoop/item/RecommenderJob.java >>>> > > > I don't understand how to pass ---outputPathForSimilarityMatrix >>>> option >>>> > to >>>> > > > RecommenderJob >>>> > > > >>>> > > > >>>> > > > 2014-07-21 4:58 GMT+04:00 Peng Zhang <[email protected]>: >>>> > > > >>>> > > >> Seraga, >>>> > > >> >>>> > > >> I have two comments: >>>> > > >> 1. Don’t use negative user ids. Since Mahout uses user id as >>>> well as >>>> > > item >>>> > > >> id as the row/column index, you’d better use 0, 1, 2, etc as ids >>>> > > >> 2. If you want to get the item similarity information, you can >>>> use >>>> > > >> --outputPathForSimilarityMatrix in the command >>>> > > >> >>>> > > >> Regards, >>>> > > >> Peng Zhang >>>> > > >> M: +86 186-1658-7856 >>>> > > >> [email protected] >>>> > > >> >>>> > > >> >>>> > > >> >>>> > > >> >>>> > > >> >>>> > > >> On Jul 21, 2014, at 4:00 AM, Serega Sheypak < >>>> [email protected] >>>> > > >>>> > > >> wrote: >>>> > > >> >>>> > > >>> All bad things happen here: >>>> > > >>> >>>> > > >>> >>>> > > >>> >>>> > > >>> Name >>>> > > >>> >>>> > > >>> RecommenderJob-PartialMultiplyMapper-Reducer >>>> > > >>> >>>> > > >>> User >>>> > > >>> >>>> > > >>> oozie >>>> > > >>> >>>> > > >>> Process User >>>> > > >>> >>>> > > >>> oozie >>>> > > >>> >>>> > > >>> Group >>>> > > >>> >>>> > > >>> oozie >>>> > > >>> >>>> > > >>> Mapper Class >>>> > > >>> >>>> > > >>> PartialMultiplyMapper >>>> > > >>> >>>> > > >>> Reducer Class >>>> > > >>> >>>> > > >>> AggregateAndRecommendReducer >>>> > > >>> >>>> > > >>> >>>> > > >>> Job Input Directory >>>> > > >>> >>>> > > >>> hdfs://nameservice1/itemrec/temp/partialMultiply >>>> > > >>> >>>> > > >>> Job Output Directory >>>> > > >>> >>>> > > >>> hdfs://nameservice1/itemrec/output/ >>>> > > >>> >>>> > > >>> 14/07/20 23:57:47 INFO mapred.JobClient: Map input >>>> > records=3312879 >>>> > > >>> >>>> > > >>> 14/07/20 23:57:47 INFO mapred.JobClient: Map output >>>> > records=3313251 >>>> > > >>> >>>> > > >>> >>>> > > >>> 14/07/20 23:57:47 INFO mapred.JobClient: Reduce input >>>> > > records=3313251 >>>> > > >>> >>>> > > >>> 14/07/20 23:57:47 INFO mapred.JobClient: Reduce output >>>> records=0 >>>> > > >>> >>>> > > >>> Why does mahout returns 0 rows? it works when booleanData=true >>>> > > >> (preferences >>>> > > >>> are ignored...?) >>>> > > >>> >>>> > > >>> >>>> > > >>> >>>> > > >>> 2014-07-20 23:19 GMT+04:00 Serega Sheypak < >>>> [email protected] >>>> > >: >>>> > > >>> >>>> > > >>>> the version is: CDH-4.7.0-1.cdh4.7.0.p0.40 >>>> > > >>>> users_file: >>>> > > >>>> --inverted_item_id >>>> > > >>>> -1 >>>> > > >>>> -2 >>>> > > >>>> -3 >>>> > > >>>> -4 >>>> > > >>>> >>>> > > >>>> users_items_prefs >>>> > > >>>> --inverted item_id >>>> > > >>>> -1 1 1.0 >>>> > > >>>> -2 2 1.0 >>>> > > >>>> -3 3 1.0 >>>> > > >>>> -4 4 1.0 >>>> > > >>>> --user_id item_id pref_value >>>> > > >>>> 11 1 1.6 >>>> > > >>>> 11 2 1.6 >>>> > > >>>> 123 3 2.0 >>>> > > >>>> 123 4 2.0 >>>> > > >>>> 333 1 2.0 >>>> > > >>>> 333 2 1.6 >>>> > > >>>> --e.t.c. >>>> > > >>>> >>>> > > >>>> if I set --booleanData true >>>> > > >>>> then mahout returns the result. >>>> > > >>>> >>>> > > >>>> >>>> > > >>>> >>>> > > >>>> >>>> > > >>>> 2014-07-20 23:12 GMT+04:00 Andrew Musselman < >>>> > > [email protected] >>>> > > >>> : >>>> > > >>>> >>>> > > >>>> I'm confused about how you're constructing the user file, and >>>> why >>>> > > there >>>> > > >>>>> are negated item ids here. >>>> > > >>>>> >>>> > > >>>>> Can you post some more details please, including Mahout >>>> version and >>>> > > >> some >>>> > > >>>>> sample data sets? >>>> > > >>>>> >>>> > > >>>>>> On Jul 20, 2014, at 11:57 AM, Serega Sheypak < >>>> > > >> [email protected]> >>>> > > >>>>> wrote: >>>> > > >>>>>> >>>> > > >>>>>> Hi, I'm trying to create item similarity. >>>> > > >>>>>> I gather items which users visit during shopping and then >>>> create a >>>> > > >> file: >>>> > > >>>>>> user_id, item_id, weight (where weight can be: [1.0, 1.6, >>>> 1.9], >>>> > > >> depends >>>> > > >>>>> on >>>> > > >>>>>> user action type and data source) >>>> > > >>>>>> UNION >>>> > > >>>>>> -item_id, item_id, 1.0 (from items dictionary) >>>> > > >>>>>> >>>> > > >>>>>> and I do provide a userFile, where user_id = -item_id >>>> > > >>>>>> >>>> > > >>>>>> The idea is to get item similary. If any user visits item >>>> named >>>> > > "A", i >>>> > > >>>>> want >>>> > > >>>>>> to show him items "B", "c", "xxx" using preferences of other >>>> > users. >>>> > > >>>>>> >>>> > > >>>>>> The problem is that the last (???) mapreduce job returns 0 >>>> rows: >>>> > > >>>>>> >>>> > > >>>>>> Here are my settings: >>>> > > >>>>>> >>>> > > >>>>>> >>>> > > >>>>>> sudo -u oozie mahout recommenditembased \ >>>> > > >>>>>> --input visited_items_with_inverted_items \ >>>> > > >>>>>> >>>> > > >>>>>> --output result \ >>>> > > >>>>>> --similarityClassname >>>> SIMILARITY_LOGLIKELIHOOD \ >>>> > > >>>>>> --usersFile inverted_items \ >>>> > > >>>>>> --numRecommendations 500 \ >>>> > > >>>>>> --booleanData false \ >>>> > > >>>>>> --maxPrefsPerUser 100 \ >>>> > > >>>>>> --maxSimilaritiesPerItem 500 \ >>>> > > >>>>>> --minPrefsPerUser 0\ >>>> > > >>>>>> --maxPrefsPerUserInItemSimilarity 30 \ >>>> > > >>>>>> --threshold 0.91 \ >>>> > > >>>>>> --tempDir temp \ >>>> > > >>>>>> >>>> > > >>>>>> Some counters... I don't get what do they mean.... >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:43:08 INFO mapred.JobClient: >>>> > > >>>>>> >>>> > org.apache.mahout.cf.taste.hadoop.item.ToUserVectorsReducer$Counters >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:43:08 INFO mapred.JobClient: USERS=7528530 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:43:43 INFO mapred.JobClient: >>>> > > >>>>>> >>>> > > >>>>> >>>> > > >> >>>> > > >>>> > >>>> org.apache.mahout.cf.taste.hadoop.preparation.ToItemVectorsMapper$Elements >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:43:43 INFO mapred.JobClient: >>>> > > >>>>>> USER_RATINGS_NEGLECTED=1,798,738 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:43:43 INFO mapred.JobClient: >>>> > > >>>>> USER_RATINGS_USED=12,429,693 >>>> > > >>>>>> >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:44:24 INFO mapred.JobClient: >>>> > > >>>>>> >>>> > > >>>>> >>>> > > >> >>>> > > >>>> > >>>> org.apache.mahout.math.hadoop.similarity.cooccurrence.RowSimilarityJob$Counters >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:44:24 INFO mapred.JobClient: ROWS=3312879 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:45:18 INFO mapred.JobClient: >>>> > > >>>>>> >>>> > > >>>>> >>>> > > >> >>>> > > >>>> > >>>> org.apache.mahout.math.hadoop.similarity.cooccurrence.RowSimilarityJob$Counters >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:45:18 INFO mapred.JobClient: >>>> > COOCCURRENCES=35882374 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:45:18 INFO mapred.JobClient: >>>> > PRUNED_COOCCURRENCES=0 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:00 INFO mapred.JobClient: Map input >>>> > > records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:00 INFO mapred.JobClient: Map output >>>> > > >> records=17570268 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:00 INFO mapred.JobClient: Reduce input >>>> > > >>>>> records=5221907 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:00 INFO mapred.JobClient: Reduce output >>>> > > >>>>> records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:34 INFO mapred.JobClient: Reduce input >>>> > > >>>>> records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:34 INFO mapred.JobClient: Reduce output >>>> > > >>>>> records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:34 INFO mapred.JobClient: Reduce input >>>> > > >>>>> records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:46:34 INFO mapred.JobClient: Reduce output >>>> > > >>>>> records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:06 INFO mapred.JobClient: Map input >>>> > > records=7528530 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:06 INFO mapred.JobClient: Map output >>>> > > >> records=3313251 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:06 INFO mapred.JobClient: Reduce input >>>> > > >>>>> records=3313251 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:06 INFO mapred.JobClient: Reduce output >>>> > > >>>>> records=3313251 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:40 INFO mapred.JobClient: Map input >>>> > > records=6626130 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:40 INFO mapred.JobClient: Map output >>>> > > >> records=6626130 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:40 INFO mapred.JobClient: Reduce input >>>> > > >>>>> records=6626130 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:47:40 INFO mapred.JobClient: Reduce output >>>> > > >>>>> records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:48:26 INFO mapred.JobClient: Map input >>>> > > records=3312879 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:48:26 INFO mapred.JobClient: Map output >>>> > > >> records=3313251 >>>> > > >>>>>> >>>> > > >>>>>> 14/07/20 22:48:26 INFO mapred.JobClient: Reduce input >>>> > > >>>>> records=3313251 >>>> > > >>>>>> >>>> > > >>>>>> -------- >>>> > > >>>>>> 14/07/20 22:48:26 INFO mapred.JobClient: Reduce output >>>> > records=0 >>>> > > >>>>>> -------- >>>> > > >>>>>> >>>> > > >>>>>> why 0??? >>>> > > >>>>> >>>> > > >>>> >>>> > > >>>> >>>> > > >> >>>> > > >> >>>> > > >>>> > > >>>> > >>>> >>> >>> >> >
