K1. Least squares approximation

Functions
Sub	Lmdif1 (F As LongPtr, M As Long, N As Long, X() As Double, Fvec() As Double, Tol As Double, Info As Long, Optional Info2 As Long)
	Nonlinear least squares approximation by Levenberg-Marquardt method (Jacobian not required) (simple driver)
Sub	Lmdif1_r (M As Long, N As Long, X() As Double, Fvec() As Double, Tol As Double, Info As Long, XX() As Double, YY() As Double, IRev As Long, Optional Info2 As Long)
	Nonlinear least squares approximation by Levenberg-Marquardt method (Jacobian not required) (simple driver) (reverse communication version)

Detailed Description

This is the group of K1. Least squares approximation.