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https://issues.apache.org/jira/browse/MAHOUT-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12720128#action_12720128
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Jeff Eastman commented on MAHOUT-65:
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I committed MAHOUT-65c and another patch to make bindings transient. Sorry 
about the formatting, I use the Lucene formatter in Eclipse and reformat as a 
reflex. I will also add the set(label, index, value) function you requested and 
will implement labels in Matrix next. In Matrix, I expect the bindings should 
not be transient, but be amortized as part of the matrix's state as Ted 
suggested above.

> Add Element Labels to Vectors and Matrices
> ------------------------------------------
>
>                 Key: MAHOUT-65
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-65
>             Project: Mahout
>          Issue Type: New Feature
>          Components: Matrix
>    Affects Versions: 0.1
>            Reporter: Jeff Eastman
>            Assignee: Jeff Eastman
>         Attachments: MAHOUT-65.patch, MAHOUT-65b.patch, MAHOUT-65c.patch
>
>
> Many applications can benefit by accessing elements in vectors and matrices 
> using String labels in addition to numeric indices. Investigate adding such a 
> capability.

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