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https://issues.apache.org/jira/browse/MAHOUT-65?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12615636#action_12615636
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Karl Wettin commented on MAHOUT-65:
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bq. could you please state the problem you are trying to solve
The way I look at it attribute names (labels), types and meta data is the part
of the same thing. I predict the future will contain more meta data in class
Attribute and Attributes, but right now I'm only concerned about attribute
names and ordinal value codec. Typically this would be interesting at pre
processing time and not when invoking some algorithm on the matrix.
bq. and how closely binding these Attributes to every Vector/Matrix instance
helps us to solve it?
I honestly don't see how my dry code is more closly bound to Vector/Matrix than
the Map in the patch?
bq. But it really should be a separate JIRA, possibly as a follow-on to this
one.
I really don't agree. If anything I think we should rename this issue to
something like "Attribute meta data". You see, I'm doing my best here to come
up with an alternative to the patch as I don't like it. It is to static and has
no room for more meta data. I mean, it's just a map! Should we also add a map
in the vector for ordinal values, one for types, et c? I really don't think
that is a good solution. I want meta data be gathered together in some
aggregated layer because I think such data belongs together. (I still think it
should be completely separated from the Vector and Matrix.)
> 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
> Reporter: Jeff Eastman
> Attachments: MAHOUT-65.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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