How to make intercept 0 in fitlm?

Hello,

i have this code here. I got my result for this code but I want the intercept to be 0. Does anyone know how to do that?

A = [3 ; 6 ; 9 ; 12 ; 15 ; 18 ; 21 ; 24];

b = [13.65249633; 27.43151638; 40.81176096; 54.58291934; 69.15880849; 82.02503856; 95.68163465; 1.10E+02];

mdl = fitlm(A,b,'linear','RobustOpts','off')

Result: Estimate SE tStat pValue

______ ______ ______ ________

    (Intercept)    -0.14799     0.27475    -0.53862       0.60954
    x1                4.579    0.018137      252.47    2.6057e-13

is it possible to make the Estimated intercept 0? I am pretty sure that the estimated x1 will change in value and that's actually what I'm aiming for...

Thanks a lot!

Answer 1

[Rik]

If you just want the value for x1:

A = [3 ; 6 ; 9 ; 12 ; 15 ; 18 ; 21 ; 24];
b = [13.65249633; 27.43151638; 40.81176096; 54.58291934;...
    69.15880849; 82.02503856; 95.68163465; 1.10E+02];
x1=A\b;

If you want to force the intercept to 0, you can find the solution in the fitlm doc:

mdl = fitlm(A,b,'linear','Intercept',false)%'RobustOpts','off' is the default

[Kash Costello]

Thank you so much! I got it :D