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From "Gilles (JIRA)" <>
Subject [jira] [Created] (MATH-562) "UnivariateRealPeriodicInterpolator"
Date Fri, 22 Apr 2011 15:16:36 GMT

                 Key: MATH-562
             Project: Commons Math
          Issue Type: New Feature
            Reporter: Gilles
            Assignee: Gilles
            Priority: Minor
             Fix For: 3.0

It would be an interpolator implementation that assumes that the data to be interpolated is
periodic. Thus values that are outside of the range can be passed to the interpolation function:
They will be wrapped into the initial range before being passed to the class that actually
computes the interpolation.
The constructor prototype would be:
 * Builds an interpolator.
 * @param interpolator Interpolator.
 * @param period Period.
 * @param offset Offset.
 * @param extend Number of points to be appended at the beginning and
 * end of the sample arrays in order to avoid interpolation failure at
 * the (periodic) boundaries of the orginal interval. The value is the
 * number of sample points which the original {@code interpolator} needs
 * on each side of the interpolation point.
public UnivariateRealPeriodicInterpolator(UnivariateRealInterpolator interpolator,
                                          double period,
                                          double offset,
                                          int extend) {
    // ...
Would it be useful to have that in CM?

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