Results for the Rosenbrock function using the LM algorithm with start values x₁ = 4.5, x₂ = 1.0: the distribution of the parameter values after five function calls (χ² = 1.38  ×  10^-9) is indicated by green-yellow points. The sequence of iterations is color-coded (color bar on the lower right). Early points are denoted in dark green, points toward the end of the iteration are light yellow. The red dot denotes the global minimum of the Rosenbrock function.