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https://issues.apache.org/jira/browse/MATH-683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13119334#comment-13119334
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Gilles commented on MATH-683:
-----------------------------
Yes, please attach everything that could be useful to figure out what is the
required functionality.
So, if I understand correctly, what you really request is the function that
would compute the new coefficients ("bi"):
{noformat}
Ps(k) = Sum bi * k^i
= Sum ai * (k + a)^i
= P(k + a)
{noformat}
This functionality should probably go in the "PolynomialsUtils" class:
{code}
public static double[] shiftedPolynomialCoefficients(double[] c, double shift) {
// ...
}
{code}
> Create a method shift in the PolynomialFunction class
> -----------------------------------------------------
>
> Key: MATH-683
> URL: https://issues.apache.org/jira/browse/MATH-683
> Project: Commons Math
> Issue Type: New Feature
> Affects Versions: 3.0
> Environment: All
> Reporter: DI COSTANZO
> Priority: Trivial
>
> Create a method shift to transform a polynomial P(k) in P(k + a) where a is
> any double value.
> The polynomial sum(ai * k^i) turns into sum(ai * (k+a)^i)
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