Parameters | Predictive Modeling | Lock-In Marker Variables

Lock-In Marker Variables
Use this option to specify marker variables to always include in the model. The specified variables are not considered to be candidates for subsequent predictor reduction steps.
Note : Marker variables are assumed as continuous predictors in the options available in the Predictor Reduction tab.
To Specify One or More Lock-In Marker 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 Marker Variables field, as shown below: