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From Ramiro Pereira de Magalhães (JIRA) <j...@apache.org>
Subject [jira] [Created] (MATH-889) Add a method in Interval that verifies if a double is inside the Interval
Date Sun, 04 Nov 2012 13:34:12 GMT
Ramiro Pereira de Magalhães created MATH-889:
------------------------------------------------

             Summary: 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


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 double 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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