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Posted to dev@mahout.apache.org by "David Hall (JIRA)" <ji...@apache.org> on 2009/08/07 22:01:14 UTC
[jira] Created: (MAHOUT-161) Add Vector.norm to compute k-norms of
vectors
Add Vector.norm to compute k-norms of vectors
---------------------------------------------
Key: MAHOUT-161
URL: https://issues.apache.org/jira/browse/MAHOUT-161
Project: Mahout
Issue Type: Improvement
Components: Matrix
Affects Versions: 0.2
Reporter: David Hall
Fix For: 0.2
Attachments: MAHOUT-161
This patch adds Vector.norm(double power) to Vector (and an implementation to AbstractVector).
AbstractVector.normalize now calls norm.
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[jira] Assigned: (MAHOUT-161) Add Vector.norm to compute k-norms of
vectors
Posted by "Grant Ingersoll (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Grant Ingersoll reassigned MAHOUT-161:
--------------------------------------
Assignee: Grant Ingersoll
> Add Vector.norm to compute k-norms of vectors
> ---------------------------------------------
>
> Key: MAHOUT-161
> URL: https://issues.apache.org/jira/browse/MAHOUT-161
> Project: Mahout
> Issue Type: Improvement
> Components: Matrix
> Affects Versions: 0.2
> Reporter: David Hall
> Assignee: Grant Ingersoll
> Fix For: 0.2
>
> Attachments: MAHOUT-161
>
>
> This patch adds Vector.norm(double power) to Vector (and an implementation to AbstractVector).
> AbstractVector.normalize now calls norm.
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[jira] Commented: (MAHOUT-161) Add Vector.norm to compute k-norms
of vectors
Posted by "David Hall (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740821#action_12740821 ]
David Hall commented on MAHOUT-161:
-----------------------------------
normalize(power) returns this.divide(norm(power)).
norm(p) == ||v||_p,
normalize(p) == v / ||v||_p
norm(p) is useful to check if a vector is sufficiently close to 0, e.g. if the difference between two phases of an optimization is close enough to convergence.
> Add Vector.norm to compute k-norms of vectors
> ---------------------------------------------
>
> Key: MAHOUT-161
> URL: https://issues.apache.org/jira/browse/MAHOUT-161
> Project: Mahout
> Issue Type: Improvement
> Components: Matrix
> Affects Versions: 0.2
> Reporter: David Hall
> Fix For: 0.2
>
> Attachments: MAHOUT-161
>
>
> This patch adds Vector.norm(double power) to Vector (and an implementation to AbstractVector).
> AbstractVector.normalize now calls norm.
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[jira] Updated: (MAHOUT-161) Add Vector.norm to compute k-norms of
vectors
Posted by "David Hall (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Hall updated MAHOUT-161:
------------------------------
Attachment: MAHOUT-161
> Add Vector.norm to compute k-norms of vectors
> ---------------------------------------------
>
> Key: MAHOUT-161
> URL: https://issues.apache.org/jira/browse/MAHOUT-161
> Project: Mahout
> Issue Type: Improvement
> Components: Matrix
> Affects Versions: 0.2
> Reporter: David Hall
> Fix For: 0.2
>
> Attachments: MAHOUT-161
>
>
> This patch adds Vector.norm(double power) to Vector (and an implementation to AbstractVector).
> AbstractVector.normalize now calls norm.
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[jira] Resolved: (MAHOUT-161) Add Vector.norm to compute k-norms of
vectors
Posted by "Grant Ingersoll (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-161?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Grant Ingersoll resolved MAHOUT-161.
------------------------------------
Resolution: Fixed
Committed revision 802515.
> Add Vector.norm to compute k-norms of vectors
> ---------------------------------------------
>
> Key: MAHOUT-161
> URL: https://issues.apache.org/jira/browse/MAHOUT-161
> Project: Mahout
> Issue Type: Improvement
> Components: Matrix
> Affects Versions: 0.2
> Reporter: David Hall
> Assignee: Grant Ingersoll
> Fix For: 0.2
>
> Attachments: MAHOUT-161
>
>
> This patch adds Vector.norm(double power) to Vector (and an implementation to AbstractVector).
> AbstractVector.normalize now calls norm.
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[jira] Commented: (MAHOUT-161) Add Vector.norm to compute k-norms
of vectors
Posted by "Grant Ingersoll (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/MAHOUT-161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12740797#action_12740797 ]
Grant Ingersoll commented on MAHOUT-161:
----------------------------------------
How is this different from normalize(power) that is already on Vector?
> Add Vector.norm to compute k-norms of vectors
> ---------------------------------------------
>
> Key: MAHOUT-161
> URL: https://issues.apache.org/jira/browse/MAHOUT-161
> Project: Mahout
> Issue Type: Improvement
> Components: Matrix
> Affects Versions: 0.2
> Reporter: David Hall
> Fix For: 0.2
>
> Attachments: MAHOUT-161
>
>
> This patch adds Vector.norm(double power) to Vector (and an implementation to AbstractVector).
> AbstractVector.normalize now calls norm.
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