MATLAB: How to get the constant term when performing multiple linear regression using STEPWISEFIT

interceptmethodStatistics and Machine Learning Toolboxstepwise

I'm using STEPWISEFIT to perform multiple linear regression of the response values in the n-by-1 vector y on the predictive terms in the n-by-p matrix X as follows:
[b,SE,PVAL,INMODEL,STATS,NEXTSTEP,HISTORY] = stepwisefit(X,y);
However, the size of b contains only p-1 coefficients i.e., the constant term is not included.

Best Answer

The constant term of the model corresponds to the "intercept" field of the output structure STATS and can be obtained as follows:
b0 = STATS.intercept
Related Question