K1. Least squares approximation

Functions
function	lmdif1 (f::Function, m::Integer, n::Integer, x::Array{Float64}, fvec::Array{Float64}, tol::Real=1.0e-10)
	Nonlinear least squares approximation (Levenberg-Marquardt method) (Jacobian not required) (simple driver)

Detailed Description

This is the group of K1. Least squares approximation.