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From "Lance Norskog (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (MAHOUT-941) Improve ConfusionMatrix statistics
Date Thu, 07 Jun 2012 20:17:23 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13290816#comment-13290816
] 

Lance Norskog edited comment on MAHOUT-941 at 6/7/12 8:16 PM:
--------------------------------------------------------------

Prints Accuracy and Reliability stats, plus standard deviation of reliability.

Accuracy = "Producer Accuracy", includes unclassified results.
Reliability = "User Accuracy", does not include unclassified results.
                
      was (Author: lancenorskog):
    Prints and Accuracy and Reliability stats, plus standard deviation of reliability.

Accuracy = "Producer Accuracy", includes unclassified results.
Reliability = "User Accuracy", does not include unclassified results.
                  
> Improve ConfusionMatrix statistics
> ----------------------------------
>
>                 Key: MAHOUT-941
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-941
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Classification
>            Reporter: Lance Norskog
>            Assignee: Robin Anil
>            Priority: Minor
>             Fix For: 0.8
>
>         Attachments: Bayes.zip, MAHOUT-941.patch, MAHOUT-941.patch, MAHOUT-941.patch,
SGD.zip
>
>
> This patch adds more statistics to the ConfusionMatrix and RequestAnalyzer.
> # Add Kappa measure - a standard measure comparing a sample v.s. random assignment.
> # Add mean & standard deviation of individual labels - assist in identifying consistent
mal-assignment v.s. high and low quality labels.
> Also, the SGD solver saves its model periodically to /tmp/news-groups-number. This patch
moves those captures to the model/ output directory. (These intermediate models are interesting
for tracking SGD incremental development.)

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