NLFitlmpar Method

public static void lmpar(
	int n,
	double[] r,
	int ldr,
	int[] ipvt,
	double[] diag,
	double[] qtb,
	double delta,
	ref double par,
	double[] x,
	double[] sdiag,
	double[] wa1,
	double[] wa2
)

Parameters

n  Int32

The number of variables.

r  Double

Upper triangular matrix R from a QR factorization (stored column-major).

ldr  Int32

Leading dimension of r.

ipvt  Int32

Permutation vector defining the pivoting.

diag  Double

Diagonal scaling matrix D (as a vector).

qtb  Double

The first n components of (Qᵀ)b.

delta  Double

Upper bound on the Euclidean norm of D*x.

par  Double

On input, an initial estimate of the parameter; on output, the final estimate.

x  Double

Output array that receives the least-squares solution.

sdiag  Double

Output array that receives the diagonal elements of the upper triangular matrix S.

wa1  Double

Working array of length n.

wa2  Double

Working array of length n.

Reference