MATLAB: Force the intercept of a regression to be a combination of the coefficients

fitlmlinear regressionwilkinson

I'd like to run a linear regression of the form y = a + b*x1 + c*x2, where the intercept a is equal to b+c.

How can I set this condition in fitlm using the Wilkinson notation?

Ok I solved it using fmincon

There are 2 main ways you can do this:

dlm = fitlm(X,y,'Intercept',false);

or using Wilkinson notation:

dlm = fitlm(X,y,'y~x1-1');

I would highly suggest learning the Wilkinson notation, as this allows you to fit models and specify the form of the equation you would like to fit.

For interpreting the b values from a logistic regression, this pretty detailed explanation might be helpful.