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https://issues.apache.org/jira/browse/MATH-889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13490661#comment-13490661
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Ramiro Pereira de Magalhães commented on MATH-889:
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Luc, thank you for your attention to this request.
> Add a method in Interval that verifies if a double is inside the Interval
> -------------------------------------------------------------------------
>
> Key: MATH-889
> URL: https://issues.apache.org/jira/browse/MATH-889
> 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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