You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: numz.m
    path of file: ./repos/malini/Codes/FC_EC_calculation code/DynamicFC/jplv7/spatial/gmm_models
    
    the code of the file until where you have to start completion: function  G=numz(b,infoz,stat,varargin)
% PURPOSE: Evaluate numerical derivs in MINZ package
%-----------------------------------------------------------------
% USAGE:  G=numz(b,infoz,stat,varargin)

    
function  G=numz(b,infoz,stat,varargin)
% PURPOSE: Evaluate numerical derivs in MINZ package
%-----------------------------------------------------------------
% USAGE:  G=numz(b,infoz,stat,varargin)
% Where
%   b:        k-vector of parms
%   infoz:     structure variable with options for MINZ
%   stat:     structure variable with status for MINZ
%   varargin: variable number of arguments needed by function 
%               being differentiated (infoz.func or infoz.momt)
%-----------------------------------------------------------------
%VERSION: 1.1.1 (9/23/00)

% written by:
% Mike Cliff,  Purdue Finance  mcliff@mgmt.purdue.edu
% CREATED: 12/8/98
% MODIFIED: 9/23/00 (1.1.1 fcnchk)

if ~isfield(infoz,'delta')
  dh=.000001;             % Sets precision of Numerical Derivs
else
  dh = infoz.delta;
end