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From "Dennis Hendriks (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MATH-603) StepNormalizer in MULTIPLES mode may give output twice for the same time point
Date Fri, 24 Jun 2011 09:26:47 GMT

     [ https://issues.apache.org/jira/browse/MATH-603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dennis Hendriks updated MATH-603:
---------------------------------

    Attachment: step-normalizer-multiples-mode-output-twice-603.patch

Proposed fix.

> StepNormalizer in MULTIPLES mode may give output twice for the same time point
> ------------------------------------------------------------------------------
>
>                 Key: MATH-603
>                 URL: https://issues.apache.org/jira/browse/MATH-603
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 3.0
>            Reporter: Dennis Hendriks
>              Labels: patch
>             Fix For: 3.0
>
>         Attachments: step-normalizer-multiples-mode-output-twice-603.patch
>
>
> If the StepNormalizer is used in MULTIPLES mode, and a normalized point is very close
to the last point (for instance the start time), then it may be rounded to the same point
as the previous point. This is because 1 + e = 1, where e <= machine epsilon. This results
in output being given twice for the same point. I made a small patch to avoid this from happening.

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