Order of Coefficients in glmfit
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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.
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Accepted Answer
Wayne King
on 12 Oct 2011
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.
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