System.Math.Poly

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Delphi

function Poly(const X: Single; const Coefficients: array of Single): Single;
function Poly(const X: Double; const Coefficients: array of Double): Double;
function Poly(const X: Extended; const Coefficients: array of Extended): Extended;

C++

extern PACKAGE float __fastcall Poly(const float X, float const *Coefficients, const int Coefficients_Size)/* overload */;

Properties

Type	Visibility	Source	Unit	Parent
function	public	System.Math.pas System.Math.hpp	System.Math	System.Math

Description

Evaluates a uniform polynomial of one variable at the value X.

Call Poly to evaluate the polynomial represented by the Coefficients parameter at the point where the variable equals the value of the X parameter. The coefficients are ordered in increasing powers of X, as shown in the following Delphi-like example:

Coefficients[0] + Coefficients[1]*X + ... + Coefficients[N]*(X**N)

Note: In C++, the Coefficients_Size parameter is N, the highest power to which X is raised.

See Also

• Business And Finance Routines