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From "Thomas Neidhart (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MATH-626) Move RealVector.sparseIterator() to SparseRealVector
Date Fri, 18 Oct 2013 22:50:43 GMT

     [ https://issues.apache.org/jira/browse/MATH-626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Thomas Neidhart resolved MATH-626.
----------------------------------

       Resolution: Won't Fix
    Fix Version/s:     (was: 4.0)

Obsolete after resolution of MATH-870.

> Move RealVector.sparseIterator() to   SparseRealVector
> ------------------------------------------------------
>
>                 Key: MATH-626
>                 URL: https://issues.apache.org/jira/browse/MATH-626
>             Project: Commons Math
>          Issue Type: Improvement
>            Reporter: Arne Plöse
>            Priority: Minor
>
> Having this method available for all is not very efficient, because if I want use this
feature I must check for interface SparseRealVector.
> otherwise different implementations could be faster. 
> I.e. no array clone and the assigning all values again.
> Maybe one could add a menthod fillstate() to SparseRealVector to guide which is faster
- use array clone and then sparseIterator or just create the array and then fill it up.
> To reduce confusion a second Interface ArrayRealVector with the method getDataRef() and
removing getData() from RealVector would be nice - there is a toArray() this should be sufficient.




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