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From "Luc Maisonobe (JIRA)" <>
Subject [jira] [Resolved] (MATH-889) Add a method in Interval that verifies if a double is inside the Interval
Date Mon, 05 Nov 2012 08:08:12 GMT


Luc Maisonobe resolved MATH-889.

       Resolution: Fixed
    Fix Version/s: 3.1

Fixed in subversion repository as of r1405706.

As I was fixing this, I noticed other methods naming were inconsistent with IntervalsSet (getLower/getInf,
getUpper/getSup, getLength/getSize, getMidPoint/getBarycenter). I will open a new JIRA issue
to deprecate the Interval specific names and use the IntervalsSet and Region ones for consistency.

Thanks for the report.
> Add a method in Interval that verifies if a double is inside the Interval
> -------------------------------------------------------------------------
>                 Key: MATH-889
>                 URL:
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 3.0
>            Reporter: Ramiro Pereira de Magalhães
>            Priority: Minor
>             Fix For: 3.1
> It would be convenient if class org.apache.commons.math3.geometry.euclidean.oned.Interval
had a method such as the one below.
> {code}
> Here is the method code that may be added to the class.
>     /** Verifies if x is inside this Interval.
>      * @return true if x is a value between this Interval lower and upper
>      * bounds, false otherwise
>      */
>     public boolean contains(double x) {
>         return upper >= x && lower <= x;
>     }
> {code}
> Notice that I'm assuming that an Interval includes its endpoints which may not be true
in certain applications. This may imply the need to improve the Interval class (by adding
methods or internal state) that describe the inclusion or exclusion of endpoints.

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