Update CG_secondOrder.m

src/CG_secondOrder.m

 function [F, nr_of_iterations, Res] = CG_secondOrder(G, sampling, kappa, P_Omega, z, R, kmax, tol)
 
-% Solves the least squares problem for the splitting and/ or completion problem
+%% CG_SECONDORDER: Solves the least squares problem for the splitting and/ or completion problem
 % in Born approximation of order 2 numerically by using the cg method.
 % 
 % INPUT:    G           Observed far field matrix, nxhat*nd-array.
@@ -19,6 +19,8 @@ function [F, nr_of_iterations, Res] = CG_secondOrder(G, sampling, kappa, P_Omega
 %           nr_of_iterations    Number of performed CG iterations.
 %           Res                 Residuum-norms for all CG iterations, vector of length nr_of_iterations.
 %
+% SYNTAX: CG_secondOrder(G, sampling, kappa, P_Omega, z, R, kmax, tol)
+%
 % *********************************************************************************************************
 
 % initialize some variables