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FitPolynomial Method

Least-Squares fitting the points (x,y) to a k-order polynomial y : x -> p0 + p1*x + p2*x^2 + ... + pk*x^k, returning its best fitting parameters as [p0, p1, p2, ..., pk] array, compatible with Polynomial.Evaluate. A polynomial with order/degree k has (k+1) coefficients and thus requires at least (k+1) samples.

Namespace: Altaxo.Calc
Assembly: AltaxoCore (in AltaxoCore.dll) Version: 4.8.3572.0 (4.8.3572.0)
Syntax
C#
Copy
public static double[] Polynomial(
	double[] x,
	double[] y,
	int order,
	DirectRegressionMethod method = DirectRegressionMethod.QR
)

Parameters

x  Double
The x values of the sample points.
y  Double
The y values of the sample points.
order  Int32
The polynomial order.
method  DirectRegressionMethod  (Optional)
The direct regression method to use.

Return Value

Double
The fitted polynomial coefficients.
See Also