How can i use different initial values from my excel file when my load changes to different values? in this code how T_T_G can be initialized into different values from excel sheet

function [OBJ] = Main_Combined_optimization2(Opt_Param)
%% code Description: Main optimization Function 

%%Run Model with optimization Parameters 

Data = xlsread('Oilpocketall1.csv');
t                       = Data(:,1);
K                       = Data(:,2);
Top_Output              = Data(:,3);
   
 
%% call the optimizer 
[TopOilTemperture_Optimization] = Combined_Optimization2(K,Opt_Param,t);
                                                     
error_HT        = Top_Output - TopOilTemperture_Optimization;
OBJ_HT          = sum( trapz(t, error_HT.^2));
OBJ             = OBJ_HT;

%% Plot Functions
 
% figure 
% plot(Top_Output);
% grid on 
% 
% hold all 
% plot(TopOilTemperture_Optimization(:))
% ylabel('Temperature (T)')
% xlabel('Time (Min)')
% legend('Experimental result', 'Optimized Model')
% grid on

%%Calculate the RMSE 

% RMSE = sqrt(sum((Top_Output(:) - TopOilTemperture_Optimization(:)).^2) / length(Top_Output));
% display(RMSE);

RMSE_1 = sqrt(sum((Top_Output(:)- TopOilTemperture_Optimization(:)).^2) / numel(Top_Output));
display(RMSE_1);
         
end 

%%
function [TopOilTemperture_Optimization] = Combined_Optimization2(K,param,t)
%% Define combined Model Parameters (2)

B                = param(1); % Oil exponent 
k11              = param(2);

Data = xlsread('Oilpocketall1.csv');
u              = Data(:,3);

%% Define Model  Fixed/known parameters 
T_T_G = 0.40; % Top_oil initial rise over ambient  0.7(17.5) 1(2.10) 1.25(15.95) 1.25(15.95)
T_G   = 37.63; % 37.63 Top_oil temperature rise over ambient at steady state 0.7(25.83) 1(42.83) 1.25(58.2083)
To    = 231.72;  % 0.7(259.69) 1(297.7014) 1.25(296.3116)
R     = 9.73;
%% start simulting the model 
 TopOilTemperture_Optimization = [];

%% combined Model Simulation
iK          = length(K);

for j = 1:iK
            %% Run updated Model
 

       TopOil_Temperature = T_T_G + (T_G*((1+R*(K(j)).^2)/(1+R)).^B - T_T_G)*(1-exp(-t(j)/(k11*To)));
       
%      TopOil_Temperature = T_G*((1+R*(K(j))^2)/(1+R))^B + (T_T_G - T_G*((1+R*(K(j))^2)/(1+R))^B)* exp(-t(j)/(k11*To));
 

    
if ~isnan( TopOil_Temperature) && isreal( TopOil_Temperature)
    TopOilTemperture_Optimization = [TopOilTemperture_Optimization;TopOil_Temperature];
else 
    TopOilTemperture_Optimization = [TopOilTemperture_Optimization; 1000000000000000];
end   

end

end