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Posted to issues@commons.apache.org by "Luc Maisonobe (JIRA)" <ji...@apache.org> on 2011/03/23 21:15:05 UTC

[jira] [Closed] (MATH-391) Inconsistent behaviour of constructors in ArrayRealVector class

     [ https://issues.apache.org/jira/browse/MATH-391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luc Maisonobe closed MATH-391.
------------------------------


Closing issue as it was included in version 2.2, which has been released

> Inconsistent behaviour of constructors in ArrayRealVector class
> ---------------------------------------------------------------
>
>                 Key: MATH-391
>                 URL: https://issues.apache.org/jira/browse/MATH-391
>             Project: Commons Math
>          Issue Type: Bug
>    Affects Versions: 2.1
>            Reporter: Roman Werpachowski
>             Fix For: 2.2
>
>
> ArrayRealVector(double[] d) allows to construct a zero-length vector, but ArrayRealVector(double[] d, boolean copyArray) doesn't. Both should allow this as zero-length vectors are mathematically well-defined objects and they are useful boundary cases in many algorithms.
> This breaks some arithmetic operators (addition) on zero-length real vectors which worked in 2.0 but don't work in 2.1

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