FourE.m

clear
clc

data = [
3000	4.856   2.726993501 	
3000    8.932   2.726993501
3000    2.311   2.726993501
1000    9.683   2.362080486          
1000    5.555   2.362080486
1000    11.13   2.362080486
333		20.04	2.913146447
333     16.07	2.913146447
333     23.19   2.913146447
111		55.33   10.68159268
111     31      10.68159268
111     34.83   10.68159268
37		225.7	52.20506574
37      142.1	52.20506574
37      100.1   52.20506574
12.3	172.8	12.49959999
12.3    142.2	12.49959999
12.3    158.4   12.49959999
4.1		323.5	90.83352294
4.1     178.3	90.83352294
4.1     396.9   90.83352294];

%X2 = reducedchi_squared(EC50,residuals,1);
answer = zeros(10000,2);
for i = 1:length(answer)
answer(i,1) = i;    
holder = zeros(length(data),1);    
    for j = 1:length(data)
    EST = i/data(j,1);
    X2 = ((data(j,2)-EST)./data(j,3)).^2;
    holder(j) = X2;
    end
answer(i,2) = sum(holder);
end

semilogx(answer(:,1),answer(:,2))