The LOGISTIC Procedure


NLOPTIONS <options> ;

The NLOPTIONS statement controls the optimization process for conditional analyses (which result from specifying a STRATA statement) and for partial parallel slope models (which result from specifying the UNEQUALSLOPES option in the MODEL statement). An option specified in the NLOPTIONS statement takes precedence over the same option specified in the MODEL statement.

The default optimization techniques are chosen according to the number of parameters, p, as follows:

  • Newton-Raphson with ridging when $p < 40$

  • quasi-Newton when $40 \le p < 400$

  • conjugate gradient when $p \ge 400$

The available options are described in the section NLOPTIONS Statement of Chapter 19: Shared Concepts and Topics.