[jira] [Updated] (MATH-626) Move RealVector.sparseIterator() to SparseRealVector

["Phil Steitz (JIRA)" <ji...@apache.org>]

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

Phil Steitz updated MATH-626:
-----------------------------

    Affects Version/s:     (was: 3.0)
        Fix Version/s: 3.1

If we do implement this, it can wait until 3.1

> 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
>             Fix For: 3.1
>
>
> 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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