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From "Hui Wen Han (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (MAHOUT-358) the pref value field of output of org.apache.mahout.cf.taste.hadoop.item.RecommenderJob has negative
Date Wed, 07 Apr 2010 13:43:33 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854485#action_12854485
] 

Hui Wen Han edited comment on MAHOUT-358 at 4/7/10 1:41 PM:
------------------------------------------------------------

I tested using the latest code ,it also has negative.

-8014130140593843068	[576620340710744639:-1.2199921E-19,-7951291328374999828:7.480107E-34,48126569744862489:2.384486E23,5238530791562049439:-18.706377,-6651253699672801114:-12.196953,-464715186549278845:1.880351E-20,-6440428942116472673:4.77204192E8,6438740092256274461:-0.0019952098,2643050031313122095:-1.2318361E30,2426032824269149291:-7.472027E35,-2169609120485731243:7.746303E31,-382524493349727536:3.1660177E-28,5087097254091687936:-7.0834307E-28,8301497619465671266:2.3044203E-31,8927269159904309646:2.7101177E27,610401645634619257:-1.3781605E-35,7370696371201048576:4.2912E-41,-4497505405333536768:2.33E-43,-4520727025047240704:1.9914E-41,2211716127952666624:6.623E-41,5612484004861902848:2.587E-41,-4971197659777990656:8.7238E-41,-1046870931778371584:7.325E-42,-355810823770996736:7.294E-42,8391453106506891264:7.5625E-41,1281462743019880448:2.87E-42,-7664059664162844430:3.8694505E-34,1057106694599084032:-6.377059E-25,3248152683699541900:4.2230997E-33,1054050648184134457:2.0395964E-7,5914024482073:8.073283E-22,3405161408365:3.4245277E-22,8798656774456:3.4267796E-35,576628966068045048:-1.6564941,-7382777955725068574:3.869972E-34,-189248019257882624:-1.3256971E-21,4288551937843961224:5.8435236E-11,-3577538155243191233:-4.1629006E-5,576636419702957968:7.3060636E21,-6729228338123451142:3.8709957E-34,-8208622251512428544:-4.9206086E-17,692388284898256100:-1.6553918E-10,501597207358536840:4.2866007E27,610419878133971201:-1.0265883E-29,2211716127952683022:1.2700088E-26,7370696371201048576:4.2912E-41,-4497505405333536768:2.33E-43,-4520727025047240704:8.7238E-41,-1046870931778371584:6.623E-41,5612484004861902848:2.587E-41]

      was (Author: huiwenhan):
    I tested use the latest code ,it also has negative.

-8014130140593843068	[576620340710744639:-1.2199921E-19,-7951291328374999828:7.480107E-34,48126569744862489:2.384486E23,5238530791562049439:-18.706377,-6651253699672801114:-12.196953,-464715186549278845:1.880351E-20,-6440428942116472673:4.77204192E8,6438740092256274461:-0.0019952098,2643050031313122095:-1.2318361E30,2426032824269149291:-7.472027E35,-2169609120485731243:7.746303E31,-382524493349727536:3.1660177E-28,5087097254091687936:-7.0834307E-28,8301497619465671266:2.3044203E-31,8927269159904309646:2.7101177E27,610401645634619257:-1.3781605E-35,7370696371201048576:4.2912E-41,-4497505405333536768:2.33E-43,-4520727025047240704:1.9914E-41,2211716127952666624:6.623E-41,5612484004861902848:2.587E-41,-4971197659777990656:8.7238E-41,-1046870931778371584:7.325E-42,-355810823770996736:7.294E-42,8391453106506891264:7.5625E-41,1281462743019880448:2.87E-42,-7664059664162844430:3.8694505E-34,1057106694599084032:-6.377059E-25,3248152683699541900:4.2230997E-33,1054050648184134457:2.0395964E-7,5914024482073:8.073283E-22,3405161408365:3.4245277E-22,8798656774456:3.4267796E-35,576628966068045048:-1.6564941,-7382777955725068574:3.869972E-34,-189248019257882624:-1.3256971E-21,4288551937843961224:5.8435236E-11,-3577538155243191233:-4.1629006E-5,576636419702957968:7.3060636E21,-6729228338123451142:3.8709957E-34,-8208622251512428544:-4.9206086E-17,692388284898256100:-1.6553918E-10,501597207358536840:4.2866007E27,610419878133971201:-1.0265883E-29,2211716127952683022:1.2700088E-26,7370696371201048576:4.2912E-41,-4497505405333536768:2.33E-43,-4520727025047240704:8.7238E-41,-1046870931778371584:6.623E-41,5612484004861902848:2.587E-41]
  
> the pref value  field of output of org.apache.mahout.cf.taste.hadoop.item.RecommenderJob
has negative
> -----------------------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-358
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-358
>             Project: Mahout
>          Issue Type: Test
>          Components: Collaborative Filtering
>    Affects Versions: 0.4
>            Reporter: Hui Wen Han
>         Attachments: 20100407_steer_item_out_part-00000, 2010_input_steer_item_in_prefs-1.dat,
attempt_201004011623_0070_m_000000_0.htm, screenshot-1.jpg, screenshot-2.jpg, screenshot-3.jpg
>
>
> In my test the input pref values all is positive.
> the output score value has negative value ,

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