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: f_sarar_panel.m
    path of file: ./repos/malini/Codes/FC_EC_calculation code/DynamicFC/jplv7/spatial/stats/FESPD_Est_Tests
    
    the code of the file until where you have to start completion: function  llike=f_sarar_panel(parm,y,x,W1,W2,det1,det2,T)
%PURPOSE : evaluates the log-likelihood for general spatial fixed effect 
% panel model
% parm = (rho;lam)
% y : dependent variable
% x :matrix of explanatory variables
% W1 : Spatial weight matrix associated with autoregressive part (Wy)
% W2 : Spatial 
    
function value at
% the parameters rho,lambda

%------------------------------------
% Written by N. Debarsy* and C. Ertur**
% * University of Namur
%   Centre de recherches en Economie Régionale et Politique Economique (CERPE)
%   Rempart de la vierge, 8
%   5000 Namur, Belgium
%   nicolas.debarsy@fundp.ac.be

%** Université d'Orléans
%   UFR Droit-Economie-Gestion
%   Laboratoire d'Economie d'Orléans - UMR 6221 CNRS
%   Domaine Universitaire
%   Rue de Blois - BP 6739
%   45067 ORLEANS Cedex 2, France
%   cem.ertur@univ-orleans.fr
% This function is based on James P. LeSage's function f2_sac.m 

%-------------------------------------------------------------
rho=parm(1,1);
lam=parm(2,1);
NT1=length(y);
N=NT1/T;
gsize = det1(2,1) - det1(1,1);
 i1 = find(det1(:,1) <= rho + gsize);
 i2 = find(det1(:,1) <= rho - gsize);
 i1 = max(i1);
 i2 = max(i2);
 index = round((i1+i2)/2);
if isempty(index)
index = 1;
end