Parameters | Predictive Modeling | Lock-In Class Predictor Variables

Lock-In Class Predictor Variables
Use this field to specify class/qualitative variables to always include in the model .
For each level of these variables , numeric indicator variables of 0s and 1s indicating class membership are constructed when necessary.
Variables specified here are not considered in subsequent predictor reduction steps.
To Specify One or More Class Predictor Variables:
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All of the variables in the input data set are displayed in the Available Variables field.
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Click to add the highlighted variable(s) to the Lock-In Predictor Class Variables field, as shown below: