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: to_liked.m
    path of file: ./repos/malini/Codes/FC_EC_calculation code/DynamicFC/jplv7/optimize
    
    the code of the file until where you have to start completion: function like =  to_liked(b,y,x);
% PURPOSE: evaluate tobit log-likelihood
%          to demonstrate optimization routines
%-----------------------------------------------------
% USAGE:    like = to_liked(b,y,x) 
% where:     b = parameter vector (k x 1)
%            y = dependent variable vector (n x 1)
%            x = explanatory variables matrix (n 
    
function returns a scalar equal to the
%       negative of the log likelihood function
%       or a scalar sum of the vector depending
%       on the value of the flag argument
%       k ~= m because we may have additional parameters
%           in addition to the m bhat's (e.g. sigma)
%-----------------------------------------------------
% error check
if nargin ~= 3,error('wrong # of arguments to to_like1'); end;
[m1 m2] = size(b);
if m1 == 1
 b = b';
end