Shared Concepts and Topics


By default, SAS/STAT linear models automatically include a column of 1s in $\bX $ which corresponds to an intercept parameter. In many procedures you can use the NOINT option in the MODEL statement to suppress this intercept. For example, the NOINT option is useful when the MODEL statement contains a classification effect and you want the parameter estimates to be in terms of the mean response for each level of that effect.