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Posted to dev@mahout.apache.org by "Lance Norskog (JIRA)" <ji...@apache.org> on 2012/06/07 22:17:23 UTC
[jira] [Comment Edited] (MAHOUT-941) Improve ConfusionMatrix
statistics
[ 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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