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From Sébastien Brisard (JIRA) <j...@apache.org>
Subject [jira] [Commented] (MATH-875) Deprecate RealVector.sparseIterator() and FieldVector.sparseIterator()
Date Mon, 08 Oct 2012 05:58:03 GMT

    [ https://issues.apache.org/jira/browse/MATH-875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471414#comment-13471414
] 

Sébastien Brisard commented on MATH-875:
----------------------------------------

This improvement no longer affects version 3.1. As of version 4.0, the method must be removed.
                
> Deprecate RealVector.sparseIterator() and FieldVector.sparseIterator()
> ----------------------------------------------------------------------
>
>                 Key: MATH-875
>                 URL: https://issues.apache.org/jira/browse/MATH-875
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 3.1, 4.0
>            Reporter: Sébastien Brisard
>            Priority: Minor
>              Labels: linear, sparse
>
> Following MATH-870, {{RealVector.sparseIterator()}} and {{FieldVector.sparseIterator()}}
have become useless. Their interface was confusing. Indeed, the Javadoc states
> {quote}
> Specialized implementations may choose to not iterate over all dimensions, either because
those values are unset, or are equal to defaultValue(), or are small enough to be ignored
for the purposes of iteration.
> {quote}
> The reference to {{defaultValue()}} (which does *not* exist) suggests that the interface
offers the flexibility to chose the value which is not stored in the sparse implementation.
On the other hand, "small enough to be ignored" suggests that this default value is zero.
> In version 3.1, this method will be deprecated, to be removed in 4.0.

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