Order of Coefficients in glmfit

I've been using glmfit to do a normal regression with 7-8 predictors. syntax is [b, dev, stats] = glmfit(X, Y, 'normal','link','identity');

The equation would be Y = B0 + B1*X1 + B2*X2 + ... B7*X7 + B8*X8 What is the order of coeffs in b or in stats.beta? I assume it is B0, B1, B2, ... B7, B8.

Is this correct?

Thanks.

Answer 1

[Wayne King]

Hi Ted, that is correct. If you input an NxP predictor matrix, you will get a beta vector that is P+1 in length, the extra term (the first term) is the beta0 term.

Note the default behavior is to exclude the column vector of 1s from the predictor matrix. glmfit adds that.