The Logistic_Regression function is obsolete, and has been replaced by the LogisticRegression function. Please see LogisticRegression.
The old Logistic_Regression function (with the underscore) is implemented as a User-Defined Function in the
(Generalized Regression library). It requires the Analytica Optimizer edition to use. It still exists to support legacy models.
The newer LogisticRegression function is available in all editions of Analytica. It exists in Analytica 4.5 and up.
To convert a legacy model to use the newer version, simply remove the underscores -- the parameter order is the same.
In Analytica 4.5, this library function Logistic_Regression() has been superseded by the built-in LogisticRegression function that does not require the Optimizer edition.