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Posted to dev@mahout.apache.org by "Jonathan Traupman (JIRA)" <ji...@apache.org> on 2011/07/25 08:13:09 UTC
[jira] [Created] (MAHOUT-772) Refactor Matrix/Vector implementation
with linear operators
Refactor Matrix/Vector implementation with linear operators
-----------------------------------------------------------
Key: MAHOUT-772
URL: https://issues.apache.org/jira/browse/MAHOUT-772
Project: Mahout
Issue Type: Improvement
Components: Math
Affects Versions: 0.5
Reporter: Jonathan Traupman
Fix For: 0.6
As part of the implementation of MAHOUT-672, we refactored the various linear algebra classes to include a new superclass for matrices, the LinearOperator, which is more or less a matrix that implements various arithmetic operations but does not allow per-element or per-row/col access. Linear operators allowed us to implement things like diagonal offsets (e.g. ridge regression) and the "timesSquared" operation efficiently and generally, removing some special-case code in various algorithms.
Since in its current state, this refactor isn't ready for inclusion, and because it's fairly separate for other stuff in MAHOUT-672, I'm pulling it out into its own issue.
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[jira] [Updated] (MAHOUT-772) Refactor Matrix/Vector implementation
with linear operators
Posted by "Jeff Eastman (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jeff Eastman updated MAHOUT-772:
--------------------------------
Fix Version/s: (was: 0.7)
0.8
> Refactor Matrix/Vector implementation with linear operators
> -----------------------------------------------------------
>
> Key: MAHOUT-772
> URL: https://issues.apache.org/jira/browse/MAHOUT-772
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Affects Versions: 0.5
> Reporter: Jonathan Traupman
> Fix For: 0.8
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> As part of the implementation of MAHOUT-672, we refactored the various linear algebra classes to include a new superclass for matrices, the LinearOperator, which is more or less a matrix that implements various arithmetic operations but does not allow per-element or per-row/col access. Linear operators allowed us to implement things like diagonal offsets (e.g. ridge regression) and the "timesSquared" operation efficiently and generally, removing some special-case code in various algorithms.
> Since in its current state, this refactor isn't ready for inclusion, and because it's fairly separate for other stuff in MAHOUT-672, I'm pulling it out into its own issue.
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[jira] [Updated] (MAHOUT-772) Refactor Matrix/Vector implementation
with linear operators
Posted by "Sebastian Schelter (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sebastian Schelter updated MAHOUT-772:
--------------------------------------
Fix Version/s: (was: 0.8)
Backlog
> Refactor Matrix/Vector implementation with linear operators
> -----------------------------------------------------------
>
> Key: MAHOUT-772
> URL: https://issues.apache.org/jira/browse/MAHOUT-772
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Affects Versions: 0.5
> Reporter: Jonathan Traupman
> Fix For: Backlog
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> As part of the implementation of MAHOUT-672, we refactored the various linear algebra classes to include a new superclass for matrices, the LinearOperator, which is more or less a matrix that implements various arithmetic operations but does not allow per-element or per-row/col access. Linear operators allowed us to implement things like diagonal offsets (e.g. ridge regression) and the "timesSquared" operation efficiently and generally, removing some special-case code in various algorithms.
> Since in its current state, this refactor isn't ready for inclusion, and because it's fairly separate for other stuff in MAHOUT-672, I'm pulling it out into its own issue.
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[jira] [Updated] (MAHOUT-772) Refactor Matrix/Vector implementation
with linear operators
Posted by "Jeff Eastman (Updated) (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-772?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jeff Eastman updated MAHOUT-772:
--------------------------------
Fix Version/s: (was: 0.6)
0.7
Moving to 0.7 as there is no patch to consider and no activity on this issue since August.
> Refactor Matrix/Vector implementation with linear operators
> -----------------------------------------------------------
>
> Key: MAHOUT-772
> URL: https://issues.apache.org/jira/browse/MAHOUT-772
> Project: Mahout
> Issue Type: Improvement
> Components: Math
> Affects Versions: 0.5
> Reporter: Jonathan Traupman
> Fix For: 0.7
>
> Original Estimate: 168h
> Remaining Estimate: 168h
>
> As part of the implementation of MAHOUT-672, we refactored the various linear algebra classes to include a new superclass for matrices, the LinearOperator, which is more or less a matrix that implements various arithmetic operations but does not allow per-element or per-row/col access. Linear operators allowed us to implement things like diagonal offsets (e.g. ridge regression) and the "timesSquared" operation efficiently and generally, removing some special-case code in various algorithms.
> Since in its current state, this refactor isn't ready for inclusion, and because it's fairly separate for other stuff in MAHOUT-672, I'm pulling it out into its own issue.
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